Something like the following (doghousesystems.com multibox system) 8)

Thermaltake Armor MX + Chassis
Corsair 750W Power Supply
ASUS P6T Deluxe CrossFireX / SLI Motherboard ( Asus Rampage II Extreme afaik)
Intel Core i7 920 2.66 GHz processor
6 GB Kingston HyperX DDR3 1333 Memory (3 x 2GB DIMMs) mboard supports up to 12GB
1 x 500GB 7200 RPM WD RAID Edition II SATA drive
GeForce GTX 285 Video Card

64 bit OS