Thanks, I think I might go with the 990X board and a amd phemon X4 proc, but is there any disadvantages to using a amd cpu with a nvidia gpu?
I used a GTS-250 with my 960T when my 6950's were being RMA'd ran just fine.
I agree with joafu that the intel platform does have a better upgrade path (unless by some miracle piledriver is amazing) But for now with your budget an AMD rig is the way to go. Yeah the intels may crank a couple (literally a couple) more FPS but the Phenom II X4 will slaughter them in basically everything else.
Microcenter has the 960T (not being a fanboi) for $99.99 (which is $25 less than 965) This chip can easily clock with nothing more than multi adjustments to match the 965's clock. The 960T will easily clock to 4+ Ghz and has about an 80% chance of unlocking to a 6X.
Nothing against deneb's (they are great CPU's) But as of late all of the new denebs are nothing more than factory OC'd units and I do not support paying for clocks on black edition chips. Just trying to save ya some loot man.