Re: New build
Sweet. Drop the 8800Ultra to an 8800GTX, it's a waste. Also, you'll probably want another larger hard drive for storage. Look at the 320GB Seagate Barracuda 7200.10.
Also, you'll want to invest in some good cooling for overclocking. That processor has an unlocked multiplier, so you can OC it a ton.
C2D E6600 | 4GB DDR2-800 | 9800GTX+ | Asus P5B-E | 150GB Raptor | 320GB 7200.10 | 750W Xigmatek PSU