I meant we dont want to do the sand/stain thing with "unfinished" not "prefinished"

Wow...that's a huge question. I know it sounds simple, but it is quite complex. So complex there are entire books on the subject (both professional and lay-man). So....solid hardwood is just that. It is solid. It is the same wood cut from the same tree, from the same plank at the mill. Traditionally it is 3/4" thick. Widths vary but the classic is around 3" wide plank. A 3/4" solid hardwood can be refinish 3-4 times with a total lifespan of 60-100 years. These are either factory finished or site finished. The industry has realized that some people are too afraid of large purchases so the solid hardwood industry has come up with the idea to make their planks THINNER and thereby making them cheaper. I've seen 1/2" or even 3/8" solid hardwood. They can be refinished once...maybe twice and have a lifespan of 20 - 40 years. These thinner solid hardwoods are often factory finished (cheap, thin and fast). And that's the easy part. Engineered hardwood...where to start. First off the TOP layer is the ONLY LAYER that contains the pricey hardwood that you are paying for. Everything else is like "plywood". The body of the plank is made up of cross-hatched layers of wood (not always hardwood) that are glued together. The top layer will range from 2mm - 6mm. The ability to refinish will depend on the thickness of the top layer (known as the wear layer). You need 3mm of wood to complete a full sand and refinish - just once. So the 2mm wear layer is a "one and done" type of floor. It has a life span of roughly 20 years (though many people rip them out after 15 because they look beaten up). The 6mm wear layer in a 3/4" engineered plank that is site finished is the Holy Grail of the engineered hardwood world. They are the most expensive, the most beautiful and offer the longest life cycle of all engineered hardwoods. They are so expensive that they are MORE expensive than solid hardwood floors. Whew. There is so much more but that's the difference in a nutshell. Shaw has had some complaints. The biggest issues with wood will be humidity and indoor climate control. Ask your builder to check the heating/cooling system. Ask them detailed questions about the unit's capability to handle climate control that is REQUIRED for a hardwood floor - regardless of the presentation.

I'm not sure what LVT is. :) I have an appointment with the flooring person for Saturday to test out samples. Cherie, we hate forced hot air because it bothers my and the kids' asthma and allergies so I am actually very happy about these baseboard radiators as radiant heat is much easier on the lungs since it's not blowing hot air all over the place. There is central air for the summer months. We live in Northern NH... it gets cold here for sure. I am going to keep the tile in the kitchen for now and the rest will be new flooring *all going in the same direction* ! We are ripping out the red carpeting, which is in all four bedrooms as well as on the stairs. We want to replace that with flooring and we don't want yet another type of flooring in the house so it makes sense to do the living and dining room as well. When we reconfigure the kitchen, we'll have to match it up and remove the tile at that time.

I don't think the hardwood from today is nearly as good as the hardwood from even a few decades ago. I have small dogs - both less than 20 pounds. But they're young, like to play, and they've left some pretty amazing scratches and skitter marks in the hardwood - in 2 different homes. Yes I keep their nails trimmed, they get a quick dremel every week. The old floors were site finished oak hardwoods. And there were spots where the scratches were getting pretty bad. The one house in question is in a beach town, so between the dogs and the sand, the floors were very scratched up. I deliberately chose a wood look LVP and it's held up incredibly well, but no one will mistake it for site finished hardwood either. I have engineered wood in my primary home - and while they've scratched that up too, it's somewhat less noticeable because it's a matte finish, and it's pre-finished engineered, which I've heard may be somewhat harder.