Well, i've bought all three of these same components. Also a Zalman 9500LED. Right now they are all sitting in a box in my hall closet.
I have everything else:
The only thing I'm waiting on is the G71's that will be out in March.
I'll buy (1) 7900GTX. Also, rumor has it that the Physix cards could be out in march also.
My thought is this. Single core Opteron 150 - can easily OC to 2.8Ghz on air. Throw in the new 7900GTX + hook up with the new physix card. There won't be any need for dual core cpu's. "For gaming PC's" The PPU will be taking a huge load off the CPU anyway.
Oh, by the way. This PC i'm building is GAMING ONLY.
OS, Drivers, Games, Benchmark Utilites. (Nothing Else!)