Thats a good CPU and Vid card. However that being said, i would hold off another 2-3 weeks as Bulldozer will be out and that CPU will drop in price a fair amount. and you also have the option of getting the new generation of AMD CPU.
Do you have a budget?
I have that exact CPU in a ASUS Crosshair Formula IV (about 12 months old now)
so if you are dead set on that CPU i would reccomend an Asus Crosshair Formula V
Uh, to be honest, I would NOT get the above mobo. I would just wait for Bulldozer CPUs, and then buy a cheaper, decent board that doesn't give you tons of extra useless features but DOES have PCI-E 3. This way you'll still be able to upgrade to the newest GPUs two, three years from now.
In any case, I would SERIOUSLY hold off on that CPU and wait for a Zambezi part. That X6 isn't bad, but intel outclasses it by far, and AMD themselves are about to release stuff that easily beats it. Don't build a new rig on half-obsolete gear.
The GPU is a nice choice though, imo. Powerful stuff, that.
No, I don't think there are any AMD boards with PCI-E 3 out YET. Which is why my advice was to wait for Zambezi. And no, I wasn't trying to start an AMD-Intel flame war. In fact... My advice was to wait for Zambezi...
Zambezi is the code name for high-end AMD desktop CPUs based on Bulldozer microarchitecture. When people say "Zambezi motherboard" they just generally mean motherboards compatible with these processors, that's all.
The CPUs are expected to cost no more than 250 USD for the fastest ones, but of course we won't know for sure until they're out.