This is my first attempt at a build. Please let me know if I've overlooked any incompatibilities and if this will explode when hooked up. Also, money isn't that big of a concern, so let me know if I can make any big improvements for a little more dough.
Graphics Card: GeForce 8800 GT $220
Motherboard: Gigabyte GA-X38-DS4 $200
Processor: E8400 $170
Power Supply: PC Power & Cooling 750W $110
RAM: Mushkin (2 x 2GB) DDR2 1066 $115
I guess all I have left to decide on is a case, a hard drive, and dvd/cd drive, but I don't think I can go too wrong on those decisions.
You have a SLI video card in a Crossfire motherboard. Why did you pick that combination?
Your PSU is sized for two top end video cards - but your motherboard/video card combo (CF motherboard/SLI GPU) says you might not be using 2 video cards after all.
It won't explode, but there's room for some improvements.
HD4850 - $180 (that 8800GT is really expensive, most of them are sub-$150)
HD4870 - $280 if you game at higher resolutions and money isn't so much of a problem
GA-EP45-DS3L - $100 (unless you plan on doing some serious crossfire in the future, in which case you'd be better of with a X48 - $250'ish, give or take)
CPU & RAM - ok
PSU: ok, or get a Corsair 750TX, enough for a crossfire with two 4870's and really silent
The case is up to personal taste, Antec and Lian Li make quality ones.