try point five and/or tradewood__my firm has found them to be excellent custom manufacturers.

i know that whenever i bid out to duratherm we'd also bid
dynamic http://www.dynamicwindows.com/home.htm?page_id=1

Loewen
Pollard
Andersen

We were not very impressed with the quality of Dynamic. Go see their product installed.

If you want the high-end of custom wood windows try Tischler.

More accessible wood window companies to research are Pella and Marvin

i'll second loewen.

marvin makes the best wood window around.

semco might be worth a look.

Okay this is coming from a guy who specs nothing but clear V.G. Fir windows 95% of the time Loewen / marvin and pella are all crap to when you look at harware and mixed grain wood that goes into the frame, if its getting painted that fine but otherwise they really are not that good and charge a premium for anything that is not a staock size.

Most of the good quality window people we deal with are on top of things and expect different sizes.

try;
- Dyanamic Windows
- Wildwood Windows
- Custom door and Window
- TNT Windows

All are built in a first class european tradition ( offering tilt and turn at a minimal cost ) can do balance sash, variety of jamb types and are more often than not willing to sit down and walk you through all their options and how they can work to YOUR design.

nothing ever compares to Duratherm....you will only be disappointed....and no, i don't work for them, i've only been down this road a few times already

Tischler und Son

Has anyone heard of http://www.windowcraft-inc.com/window_craft_portfolio.html ?

just learned about this company last week. i guess they're among the first windows on the market specifically designed to satisfy passivhaus requirements,  too!

http://www.casagrandewoodworks.com/products.html