Heres an idea.. don't waste all $2500 on your build... here are some great parts and you'll still have a good amount of money left...
Q6600
Asus P5E or Maximus Formula (then flash it to x48)
Dual HD 4850's Crossfire
Corsair 750tx (just a bit of extra fire power in case you plan to add stuff later on)
Case of your Preference
Lite-on SATA DVD-RW
Newegg.com - G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Desktop Memory for your RAM (I had that copied already...)
any DVD-ROM
So you don't need a mouse or keyboard? You didn't mention one before