Great build Bill. I just built my very first one as well two weeks ago. It's scarily similar to yours on specs too. I was extremely nervous wondering if it would start up. Surprisingly though, it was a lot easier than I thought. This thing eats up some power so I had to dedicate a socket just for the Rig itself to pull enough juice.
Only problem I had was a DOA motherboard the first go around but I'm up and running now and it was well worth it. The amount I saved building it myself was incredible. A machine similar to this prob would have run me an additional 1500-2000g just for assembly.
Here are my specs:
Intel Core i7 940 Nehalem 2.93GHz
ASUS P6T6 WS Revolution
6GB Corsair Dominator DDR3 SDRAM 1600
SAPPHIRE 100251SR Radeon HD 4870 X2 2GB
Creative Sound Blaster X-Fi Titanium Fatal1ty
Western Digital Caviar Black WD7501AALS 750GB x2
ASUS DVD Burner
COOLER MASTER HAF 932
Kingwin Mach I 1220W PSU
Vista 64
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