I build my own.
Currently I have just 2. One is a P.4b 2.4 533fsb running at 2.85 with 1 gig of ddr2700 ram, 40gig WD Special Edition 8mb cache HD, SB live Dolby Digi sound card, Nvida Geforce 4 4200 8x card.
Second it a P4 2.6 800fsb hyperthreading chip running at 2.98ghz with 512 pc3200...