John' s Quad-Core System Specs
(Updated 10/09/07)
(Click on any underlined link to go to that product's page at www.NewEgg.com)

Case:

 Antec Nine Hundred
Motherboard: Intel D975XBX2KR
Processor: Intel QX6700 Core 2 Quad Extreme (Overclocked to 3.2Ghz)
CPU Cooler: Thermalright ULTRA-120
CPU Cooler Fan: Antec 77095 120mm Blue LED Fan
Memory: 4GB Corsair TWIN2X2048-6400C4
Power Supply: PC Power and Cooling PPCT860 860W
Video Card: (2) EVGA 8600GTS 256MB GDDR3
Monitors: (2) Dell 2407 24" 1920x1200 16x9 LCD and (1) Vizio 42" VU42LF 1920x1080p HDTV monitor
Trackball Mouse: Kensington 64325 Ultimate Trackball
Keyboard: KeyTronic E03601P25PK
Operating System: Dual Boot: Microsoft Windows XP Professional w/SP2 and Windows Vista64 Ultimate
BluRay Burner: Panasonic 5582 BluRay burner (purchased from www.zipzoomfly.com)
Hard Drives: (1) Seagate ST3160812AS-RK SATA2 7200.10 160GB
Partitioned as two logical drives C:=60GB system drive (OS and programs only) & D:=100GB for misc data
  (6) Seagate ST31000340AS SATA2 7200.11 - 1 TB drives
Two drives set up as single 1 terabyte drives (E: & F:)
Four drives set up as two 2-drive 2 terabyte RAID-0 arrays (G: & H:)
(Drives E:, F:, G: and H: total of 6 terabytes online storage)
  (1) Kingwin KF-91 SATA rack
Currently includes twenty removable drive trays with Seagate 320GB, 500 and 1TB SATA drives for client projects

All parts (except the Dell monitors and the Seagate 160GB drive) were purchased from www.newegg.com
As of 4/3/2007, the current price for all components listed above (except removable drives) is approximately $4,600.

As of July 22, 2007, the price of the Intel QX6700 has been cut to around $530 instead of the $1,000 I paid in January. Intel has also introduced newer, faster Quad processors, but I have been able to overclock my QX6700 from the stock 2.66Ghz to a completely stable 3.73Ghz without it even breaking a sweat.

You might want to check out this July 16th article published at AnandTech.com on the new Intel Core 2 Extreme QX6850.