Just to be clear- our company is not a Marvin Dealer. We are a licensed building contractor that offers many kinds of construction services, from new construction, additions, remodeling, and small projects like window or door replacement. We or our customers purchase windows through a local dealer. We are in Colorado where it is very dry, but some of our customer use humidifiers and can get condensation on interior glass. This can affect woodwork that is not properly maintained. A high quality varnish or paint can easily last 20 years. Infinity dealers include installation in their price, operating with a business model similar to Andersen Renewal except that Marvin Infinity dealers are more independent than Renewal and often provide other services such as siding, roofing, and a wide range of other business services. Many general contractors prefer to keep the window installation in house so we shy away from dealers who perform installation. We have had some bad experiences with Andersen Renewal on some jobs-they kept mis-ordering windows and did not complete their installations on schedule. Our local Marvin Infinity Dealer/Installer has a great reputation and is sure to be much more organized than the Andersen Renewal outfit. Back to the question of Quality- Marvin Signature is the Top of the Line, with more options and bells and whistles available than any of the other lines. They come in wood, wood clad with aluminum, or the Modern line which is Ultrex Fiberglass with aluminum interior. They are a the best wood window made in the USA and the best fit for the historic renovation and restoration jobs that we do. Loewen Windows, made in Canada, are the only ones we have ever installed that are of similar quality. Marvin Elevate, formerly Integrity, is a Ultrex Fiberglass window with wood interiors. Elevate offers many options, awnings, casements, double hungs, sliders, trapezoids, etc. in a wide variety of colors and glass configurations including SDL. This is a very high quality window with a life expectancy as high as any window on the market today. Marvin Essential is and All-Ultrex window that has fewer options but are made to order and ship very quickly, They are a great window, very high quality and will out live and out-perform any Vinyl Window on the market Infinity Windows by Marvin are of as equally high quality as any other Marvin product, and have a great range of design options colors and glass configurations. Infinity dealers choose to work with Marvin, a company that stands behind their products, offers great dealer and customer support and great warranties. I am not a schill for Marvin, I do have extensive experience, having first installed Marvin Wood windows with true divided lites and storm panels in 1985- those windows are still working. We started installing Marvin Integrity for ourselves, our friends, and our customers I have been to the Marvin Factory in Warroad Minnesota for training and we have sent 2 of our carpenters there as well. I have seen how meticulous they are and witnessed windows undergoing arduous testing against wind and rain. I have also received great service whenever there was a problem with a unit we installed. We choose to use Marvin because we care about our customers, we care about our reputation, we care about our work.

I priced the Marvin Ultimate Next Gen and they are quite a bit more than both the A-series and the TW400s. A 3'by4' DH Marvin Ultimate was quoted at $750 while the A-series was $500 and the TW400 only $340. The Marvins were quoted by a window/door company and the Anderson's by Home Depot. I'm now leaning toward the A-series but may fall back to the TW400 depending on how the budget shakes out. Any thoughts on the pricing discrepancy? I thought the Ultimates would be more but not 50% over the A-series and double the TW400s. The Ultimates are definitely a nicer looking window but how much time will I spend staring at my windows once they're installed?

@Design Girl, thank you! So grateful for your response. This is a big project for us (25 windows, total) and I have been researching for many months. When I came across your post, I thought, "wow...finally...exactly what I want, six over six, SDL, white exterior, traditional....I wonder which she chose." Glad she is happy with her choice! For what it's worth, I had the same impression when I viewed the Elevate. It is a nice looking window but it just struck me as more modern than traditional. And I think that's why it hasn't been at the forefront of my mind, despite hearing mostly positive feedback about it. In addition to its traditional appearance, I also like that the Woodwright has a hidden jamb liner, versus the exposed jamb liner of the Elevate and the 400 series Tilt Wash. It eliminates the concern about how a gray or white or almond etc. exposed jamb liner would look with a painted or stained interior. A white jamb liner would not stand out against a white interior, of course, but if the interior will be a paint color other than white or stained, the color of the exposed jamb liner is a concern to me. I wonder if the thing about the Andersen 400 series sill which you can't recall is that it's got a good slope to it. I have heard that that it is good for shedding water. Thank you, again, for taking the time to respond to my post.

I don't know about Sanford Hills but I've had Anderson and also Pella Windows. You can't go wrong with either Anderson OR Pella. I absolutely loved them both. You get some weather in Maine so energy efficiency is important. I had a full house of Pella windows in Lake Tahoe and the energy efficiency was amazing during the cold winters. My Anderson windows were in my home 20 years ago in Sacramento but I did have one Anderson Art Glass in Lake Tahoe and it was also efficient. I had safety latches on my Pella windows. I don't know about Anderson on the safety latches. Pros --Anderson/Pella you can choose standard or custom window sizes, several glazing/glass package options and extras like exterior cladding, several grille styles and screen types and many interior/exterior color and hardware options. Pella offers several types of wood materials while Anderson's choices are very limited (I suppose this could be a Con). They can be used for new construction or replacement. Well made products. Very energy efficient. I recently read that Pella has Insynctive window sensors that integrate with smart home security systems and Anderson has Wireless VeriLock security sensors. I wish they would have had that when I bought them. Pella--Option for built-in blinds or shades (Loved this feature!). Both Pell/Anderson have roll-up/down screens which is a nice feature if you want to be able to use the screen in the summer to keep the bugs out but in the winter want to clarify your views. Anderson-- also has an Art Glass series (stained glass that you choose your own custom colors) I used on one of my kitchen windows that brought light into the kitchen without revealing the view of our neighbor. Nice! Cons-- both are expensive but well worth the luxurious beauty. Except for the limited wood choices, I can't think of any cons for Anderson. Loved the Pella windows with shades inside but one con would be that for some reason, some of the windows I had to unlock and open in order to lower or raise the shades which was inconvenient. Pella was a pain to wash because there were basically two windows with mini blinds inside. I believe Anderson windows have tilt hinges for washing...or at least some of the windows do. I HIGHLY recommend having a Pella or Anderson installer or you will have a difficult time with the warranty if you should have any issues down the road. This is an informative article which also compares Pella/Andersen to alternative lines at the end of the article. . https://www.roofingcalc.com/pella-vs-andersen-windows-cost/