Midi keyboard that's compatible with Windows 7...?

I am looking for a keyboard to input midi into Sonar 8 PE. I currently have an old Roland D-20, but it's too big and I can't use anny buttons of it in Sonar. I want a keyboard with something like 49 keys and lots of buttons and knobs that can control various functions in Sonar.

Problem is: I use Windows 7 64 bit and I discovered almost all keyboards aren't compatible with W7 (Behringer, M-Audio, etc.). Anyone knows a good keyboard (not too expensive of course) that will worj iwht W7 64 bit?