Well here is a few recommendations for sti setups and good mobos. Best Better Good
Now here is what i recommend for gaming mobos Tri-SLI Setup SLI Setup
any questions just ask me.
I recommend the ASUS P5E3 Deluxe. I have it and the QX9650 and the setup has performed flawlessly so far. The motherboard also has Crossfire support and uses DDR3, for the fastest performance available.