ASUS Sabertooth X58 $199.99
SAPPHIRE 100312-3SR Radeon HD 6950 x2 $264.99x2= $529.98
CORSAIR Vengeance 8GB Model CMZ8GX3M2A1600C8 $74.99
CORSAIR Enthusiast Series TX850 V2 $134.99
Rosewill CHALLENGER Black Gaming ATX Mid Tower $49.99
COOLER MASTER Hyper 212 Plus $25.99
COOLER MASTER SickleFlow 120mm Silent case fan $9.99x3=$29.97 (for side and for push pull on radiator)
WD Caviar Blue WD7500AALX 750GB 7200 RPM $69.99 (data drive)
Corsair Force Series 3 CSSD-F240GB3-BK 240GB $329.99 (OS drive+BF3 drive)
Total $1445.88
That should beast through any game, have fun!