I have a monster PC (if I may say it myself ;-)), it's a home built system based on Abit NF7-S 2.0 dual channel DDR motherboard (the first mobo to be Dolby certified?) with an Athlon 2800+ (Barton core), 2x Corsair Low Latency 256Mb DDR PC2700 CAS2 333MHz with Heatsink, an ASUS V9950TD GeForce FX5900 graphics card with 128Mb DDR, an Adaptec UW SCSI 160 controller card, 5x 18GB IBM Ultrastar SCSI 10Krpm U160 harddrives, one UltraPlex SCSI CD-ROM, one PlexWriter SCSI CD/RW (only 12x unfortunately). It's all built in a noise-reduced silver coloured Chieftech Full Tower, with some cool nobs with blue backlights to controll the fans, and an Abit Media-XP 5.25" Front Panel.
It's all very fast, so fast that not even the seriously bloated WindowsXP pro feels sluggish. On that computer I also run the latest version of Amiga Forever, but I must say *that* feels very sluggish compared to my 600MHz Pegasos (I have not run any CPU benchmarks however, but the *sluggish feeling* makes me rule out UAE Amiga Emulation as a serious alternative).