First off, all these are built at www.ibuypower.com, so you could customize them yourselves further.
Gamer Paladin 900:
Thermaltake Armor Gaming Case w/25cm Fan Side Panel Windows, 420W Power Supply
Cold Cathode Neon Light
1200 Watt -- [$50 OFF Mail-In Rebate] Thermaltake Toughpower W0156RU Power Supply
Intel Core 2 Extreme Quad-Core Processor QX9650 (4x 3.0GHz/12MB L2 Cache/1333FSB)
Thermaltake MaxOrb CPU Cooling Fan System Kit
Asus Striker II Formula nForce® 780i SLI Chipset w/7.1 Sound, Gb LAN, S-ATA Raid, USB 2.0, IEEE-1394 3-Way PCI-E MB
4096MB [2048MB X2] DDR2-800 PC6400 Memory Module
3x NVIDIA GeForce 8800GTX 768 MB w/DVI + TV out video --- Three Way SLI
1.5TB (750GB x2) HARD DRIVE
1.5TB (750GB x2) HARD DRIVE
[USB 2.0] 1.5TB External Storage
LiteOn LH-2B1S 2X Blu-Ray DVD Burner Internal Drive w/25GB Blu-ray Disc Rewritable, SATA Cable
LG GGC-H20L BLU-RAY/HD-DVD Reader & DVD±R/±RW Burner Internal Combo Drive
Creative Lab Sound Blaster X-Fi Platinum Fatal1ty Champion Series
It runs just under 6k. Use Windows XP or Linux.
