This will make you poop your pants.

http://www.slizone.com/content/slizone/rotm_april05.html

Full Name: Jay Venturi
Gaming Handle: Morte
Country: USA
City and State or Province: Chesapeake, Virginia
For some guys, running two GeForce 6 series cards together in SLI mode isn't enough firepower. Jay Venturi of Chesapeak, Virginia decided to up the ante on his custom Lian Li case, using two 512 MB NVIDIA Quadro workstation cards to create a monster of a machine. To ensure that he has enough power to pump all that rendering data through his dual GPUs, Jay linked together two 600W power supplies! What does this produce? How about running Doom 3 benchmarks at over 140 FPS at 1600x1200 resolution, with 4X AA? If 512 MB of RAM for each graphics card wasn't enough, Jay caps it off with an additional 16 (yes, sixteen) GB of ECC memory plugged into his motherboard. All this hardware, paired with his Dual Opteron CPUs, Jay is leaving little doubt that his PC is of the best and fastest out there!

Here are some of the specs on Jay's machine:
(2) SLI 4400 fx Quadros 512 mb each
Tyan S2895 dual opti board
(2) Dual Opteron 252 step E 90nm
16GB RAM (ECC)
1.6 Terabytes of RAID Storage (4) 400GB SATA-2 Drives
Logitech Laser mouse
Dual Layer Burner
Zelman Cooling Al-Cu
Lian Li VP2000 case
Dual 600watt power supplies (linked)
Samsung 24 inch LCD 1900x1200
Windows Enterprise Server 2003 64 bit and 32 bit

Scores:

X2 The Threat benchmark
All eye candy
1600x1200
specular, auto-detail, etc
101.601 FPS

Doom3
4x AA, ultra setting, 1600x1200
~Timedemo Demo1 usecache
141.5 FPS

Painikiller 1.62
All eye candy maxed, 1600x1200
~benchmark C5L1 212.64FPS
~benchmark C5L2 155.10 FPS

OK so I am a computer Geek and I found out what the cost is:
2x Quadro FX4400 512 MB ~ 1,699.00 each
Tyan s2895 ~ 549.00
Dual Opteron 252 ~ 869.00 each
8x 2GB or ECC RAM ~815.00 each
4x 400GB SATA2 ~607.00 each
Mouse Logitec Laser ~64.00
Dual Layer Burner ~124.00
Case and Accessories ~1000.00
2x Power SUpplies ~215.00 each
Monitor samsung 24" ~1,700.00
Windows Enterprise Server 2003 Edition~ 1,769.95

all prices are off of newegg.com (and other retail stores cause newegg didn't sell everything)
~$19,720.95

now, if I spent around $20,000 on a computer, please shoot me. Id rather have a car.