The intersection of price and performance usually points solidly at vinyl. The question will become if that fits your aesthetic goals and if that is much of a consideration at this point? Amsco seems to make a fine window. If you are in an area that has good breezes and wind speeds, I would steer away from sliders in lieu of more casements or another operator type that is going to have better air infiltration data on it.

You will have to re-stucco the house with new construction windows.

Thank you all for the help! I'm really unsure how to move forward from this point. It sounds like I probably should have hired an architect from the beginning. Or, at a minimum contracted directly with the designer to prepare the plans instead of him being sub-contracted through the builder. The one time I was able to speak to the designer, he seemed knowledgeable, so I don't want this to sound judgmental towards him. I think we just got ourselves into a poor process from the start, where the builder is the middle man and there is probably lots lost in transmission. Would it be worth it at this point to consult with an architect? The foundation is poured, so there is only so much we can change. Plus, we already have financing, so there is definitely a limit to changes without blowing our budget. Windows should still be easy enough. Would an architect even want to touch this at this point? I'm not even sure what services I would need from him/her at this point? What I normally do... is to locate the egress window (only one is required per bedroom) ...on the sides.... So, if I understand this correctly, this wouldn't resolve the issue of needing to switch window types (double hung to casement/slider) to avoid the 18" sill height, but it will put the window on a less noticeable side of the house. My three windows were placed higher and ganged together and they were narrower. On the other wall I made the single window wider and then added a window seat below it. That sounds like a lovely way to disguise mismatched windows. Do you have a picture of the window seat/egress window? I tried searching through your older posts, but didn't see it. I'd suggest a traditional approach often used in 2- and 3-story traditional residences, i.e., the windows on the first floor were the largest; the windows on the second floor were visually smaller; and the windows on the third or any other upper level, such as dormers, were the smallest of all. Virgil, thank you for lesson. I've always felt something wasn't quite right with the elevation, but couldn't figure out what it was. Part of what is triggering this ordeal, is that the plans were drawn with 10' & 9' ceilings, but the budget was based on 9' & 8'. When I caught the discrepancy, the builder didn't want to change the plans. I insisted because there is no way you can take out 2 vertical feet and not need to reevaluate the elevation, right?? Loosing those extra feet really made the larger 2nd story windows look odd and when I requested smaller windows, I was told they didn't meet code...would need casement windows...blah, blah.

@pittsburrito Did you get the easy slide? My Pella rep is advising against it, but in the showroom it seems way better than a crank.