I've had this system for almost a year - a Dell XPS 600.

CPU: Pentium D, 3.0 GHz
RAM: 2 GB
Hard Drives: 2x160 GB
Optical: DVD+RW
Video: 2x GeForce 7900 GS (256 MB) in SLI mode
Sound: Sound Blaster X-Fi (Xtreme Music, I think)
Extra Devices: Logitech G5 Laser Gaming Mouse, Logitech G15 Gaming Keyboard, Dell 1907FP Flat Panel Monitor

It's served me mostly well for the last year or so. Had a few issues with programs being glitchy on occasion, but those have been easily remedied by dusting the thing out.