I currently use a Dual Mirror Door PowerMac with Dual Monitors
Has dual 1.25 GHZ PowerPC Processors (Roughly the same as two 1.8GHZ x86 processors, i.e. intel chips) and runs Mac OS X 10.3. Will upgrade to 10.4 soon.
2 Gigs of RAM, ATI Radeon X1900PRO 256MB Graphics Card, AMD Athlon 64 X2 Dual Core Processor 3800+, 19" Wide Screen Flat Panel, 320 GB Internal Harddrive, 500GB Western Digital My Book External Harddrive, Logitech G15 Gaming Keyboard, and Windows XP Professional(buh the only thing I hate about my compy).
Emachines. Wally World special. AMD Athelon processor, obscenely big hard drive, unknown everything else. It's fast for what I use it for. I may upgrade next year.