Why the SLI motherboard, are you planning to add a second 8800 GTX later?
- If yes, the PSU is wrong, get a PC Power & Cooling Silencer 750W Crossfire instead. I'd also trust the eVGA 680A1 motherboard more.
- If not, I'd get a P35 motherboard, like GA-P35-DS3R or aBit IP35Pro.
Why Sparkle, of all companies that make 8800 GTX? I don't know about their standard 8800 GTX, but their Calibre 8800 GTX is better avoided IMO. You're probably better off with eVGA, BFG or XFX.
Have you picked a case already? Just in case you didn't know - the 8800 GTX is BIG, it will refuse to fit in some mid-tower cases.