Motherboard:
http://www.newegg.com/Product/Produc...82E16813131520 Asus P5GD1-VM $113.00 (Onboard video)
Processor:
http://www.newegg.com/Product/Produc...82E16819116185 P4 520 2.8 Ghz $158.00
Ram:
http://www.newegg.com/Product/Produc...82E16820145440 Corsair Value Select 2x512 PC3200 $78.00
Hard drive:
http://www.newegg.com/Product/Produc...82E16822148065 Seagate 250gb SATA $150.00
That's $500. Figure another 100 bucks for a case AND a proper 24 pin power supply, we are up to 600. Figure 100 bucks for opticals, if you can afford it, get a SATA Plextor DVD burner for the primary burner, a cheap Lite-On IDE CD burner is fine for a second burner. We are up to 700 bucks.
http://www.sweetwater.com/store/detail/Audiophile192/
There's your sound card. We are up to 900 bucks, incidentals (floppy, keyboard, firewire card, mouse, etc.) will still keep you under a grand. The only thing not in there is an operating system.