Recently upgraded to three GTX 480s in Tri-SLI.
http://service.futuremark.com/compare?3dmv=2518829
Specs:
Intel Core i7 980X @ 4080MHz
Asus P6X58D Premium @ 24 x 170MHz
6 GB Mushkin Redline @ 2040 DDR
Three GTX 480 in SLI @ 800/1600/2000
50GB OCZ Vertex 2 SSD
Three 1TB SpinPoint F3 in RAID-0 - 3TB
1TB SpinPoint F1
LG 32LD450 32" LCD
Samsung 22X SH-S223L DVD-RW
Asus Xonar Essence STX sound card
Antec Twelve Hundred case
Prolimatech Megahalems heatsink
Corsair AX 1200W power supply
Shure SRH840 headphones
Razer Lycosa keyboard
CST LaserTRAC 2545 trackball