I use a 7600GS, 5700 and another older one here at my home and all work fine. The dual dvi's should work as long as you use the proprietary driver and twinview. If your not gonna use the proprietary driver it will use NV by default and that will work with one monitor I have never tried to run duals with the NV driver though.
Actually, the xorg default driver will work with as well.