I replaced mine in 2021 and did a ton of research. There's not really a "mid" window. There are cheaper vinyl windows and everything else is very expensive. Your options are:
1) Vinyl
Pro
- inexpensive compared to others
- the good ones seal really well
Con
- thicker frame because the vinyl is way less heat tolerant than other materials. So if the vinyl warps and loses some strength, you need more of it to hold the glass. The thicker frames take away some of the window area so you see more frame and less glass.
- I happen to think they don't look as good.
2) Composite/Fiberglass
Pro
good combination of strength, aesthetics, and cost
Con
- somewhat expensive
- very few manufacturers do this kind so you have less selection, basically Infinity by Marvin and I'm not sure what else
3) Wood
Pro
- look awesome
Con
- extremely expensive
- needs a lot of maintenance (paint)
- not many companies do it. Renewal by Anderson
I did a lot of research and scheduled 5 quotes (3x vinyl and 1x each of composite and wood). I would not do wood again had I known their cost. Renewal by Anderson was at my home for like 4 hours and the guy quoted me something like $55,000 for 24-28 windows. Next most expensive was Infinity by Marvin for $30,000. The vinyl ones were like $12,000-$22,000.
The thing about vinyl is that you're basically buying a window from a manufacturer and a separate installer is putting it in for you. The installer has ZERO input into quality control during the manufacturing process and also they only do one manufacturer. They CANNOT get you another type of vinyl window. The vinyl manufacturers are also locked into certain areas. So if you think Okna is the best but you're in a Jeld-wen area, you might be locked into that no matter which installer you go with. I forget which manufacturers were good but in North Georgia I couldn't get the vinyl manufacturer that I wanted no matter how many vinyl installers I called.
I ended up going with Infinity by Marvin because my house is very traditional looking and has two large porches that are heavily trafficked so people would see the windows up close a lot. They better matched the aesthetic of the original wood windows and I thought would hold up better to all the eyeball scrutiny compared to vinyl. Vinyl also didn't have as good of a color match for my home.