I was going for the X800XL that correct me if i'm wrong its suppose to be better than X800GT, but i did really do my homework and i'm going for a 6800GT.
You can ask anyone in here everybody is going to recommend it cuz like someone said before, here in this topic "that card is a beast" and the best and worst part of this is that is TRUE !
i5 2500k @ 4.5GHz
COOLER MASTER Hyper 212 Plus
16GB Corsair Vengeance LP DDR3 1600MHz
eVGA 670 GTX 2GB
Samsung 840 Pro SSD 256GB
Seagate Barracuda 7200.14 3TB
ASUS VG248QE Black 24" 144Hz, Samsung 24" S24B300, Samsung 22" 226BW & HP L1908W 19" (Quad Monitor Setup)
COOLER MASTER HAF 912