I am in Arkansas and this is a local company for me (Could they not have picked a different name other than "something" Mart!?). I am considering getting their 2900 series. Here's a link to their site: http://www.windowmart.com/WINDOWS/Doubl ... fault.aspx
I have some amount of info, but am not finding a lot about them or reviews on the web. Even if you don't know this specific company, if you can look at the info and give any feedback it would be appreciated.
U Factor: .31, SHGC: .28, AI: .12 (Energy Star product)
Double Hung/7/8" IG
Double strength glass/DuraSeal warm edge spacers
Virgin Vinyl/Colonial Grids
Sloped Sill/Fusion welded sash and main frame
Dual cam locks/Vent-security locks
Head and Sill expanders
3 1/4 Frame Depth
Nova-flex seal guard
Entire unit encased in foam
There was something about drains - but I can't remember specifically.
Cost is $470 a window
Anything else I need to ask about?
I'm not exactly sure what of that is the significant part - I just typed up everything I could find.