ExtremeTech held a competition for the most extravagant PC case mod, and this is the spec list that walked away (or, rather, rolled out) with the top prize:
Height: 6'10"
Weight: 125 lbs
Motherboard: EVGA nForce 680i SLI
Graphics cards: (2) GeForce 8800GTS OC
PSU: Enermax 1000W Power Supply
RAM: 2GB (Corsair XMS2 2x1GB RAM)
CPU: Intel Core 2 Duo E6850
HDDs: (2) Western Digital RaptorX 150GB
Case: Custom Built Optimus Prime that actually transformed and has a removable Autobot Matrix of Leadership complete with live lightning effects!
Now, if only we had an Optimus Maximus keyboard to go with it, we'd be set. Found via Forever Geek.