If that motherboard is really what you want, try getting a 7800GTX. Should be real good. THen get the new drivers from Nvidia. Nvidia this week just released a new version (81.98) of its ForceWare 80 driver. Besides addressing the usual compatibility issues, it supports cards from mixed vendors as I have mentioned before and TV-Out/HD-out in SLI mode, as well as the recently launched GeForce 7800 GS AGP.
The driver is also supposed to offer PERFORMANCE ENHANCEMENTS for dual-core CPUs. Ok, that was a bit off the side. But good info though.