Just found this site, seems to be a gold mine for technical knowledge!
My understanding of how computers work, what numbers mean, and how to put everything together is pretty limited.
This computer will be used almost strictly for gaming. I want to be SLI-compatable (don't need 3x cards, though) and at some point in the future, i may OC.
Parts I have (or have ordered) so far:
Case: Tagan Aplus CS-EL Diablo Black 0.8mm SECC ATX Full Tower Computer Case - Retail
Power Supply: Rosewill RX950-D-B 950W ATX12V v2.2 & EPS12V v2.91 SLI 8800Ultra SLI CrossFire Ready Active PFC Power Supply - Retail
The first thing you should do is return that Rosewill PSU and get a high quality one. Some brands to look for are Corsair, PC Power & Cooling, Seasonic, & Antec. Some Antec PSU's are better than others. Pretty much any PSU from the first 3 listed are all high quality. Rosewill is considered one of the worst manufactures of power supplies. If you go cheap on the PSU there is a good chance it will blow up taking other hardware with it.
You definitely want a SATA hard drive. It's the new standard, has smaller cables, and is faster. Check out this drive. It is very fast and cheap.
Thank you very much for the prompt and detailed response
I'm going to be using Vista, but not sure if it's going to be 32 or 64-bit. I'm about to go do a usability test at Microsoft and can choose a gratuity item, so it depends on whether or not i can get 64 bit