When I ordered my last computer, I made the mistake of getting an ATI x1950Pro card. It's useless with Linux. I'd like to solve this problem and am interested in the Intel on-board graphics mobos (as I heard there are FOSS drivers for their graphics adapters). I don't play games a lot anymore, but do a lot of Java work and I'd like to be able to use Beryl/Compiz, and would like to move to dual displays.

I currently have:
ATI x1950PRO
Abit NF-M2 nView
AMD 3200 X2

I'd like to run Ubuntu.

What do people recommend? Should I sell all of the above and get a C2D and Intel board? I don't want to get bit by the compatibility bug again and this seemed like the best place to learn!