Okay this is what I'm looking at so far:
MSI K8N Neo4-F Socket 939 NVIDIA nForce4-4X ATX AMD Motherboard - Retail
Model #: K8N Neo4-F
AMD Athlon 64 3500+ Venice 1GHz FSB Socket 939 Processor Model ADA3500BPBOX - Retail
Model #: ADA3500BPBOX
A-DATA 1GB 184-Pin DDR SDRAM DDR 400 (PC 3200) Unbuffered System Memory Model ADBGC1A16 - Retail
Model #: ADBGC1A16
3D Fuzion 3DFW78256GTX Geforce 7800GTX 256MB GDDR3 PCI Express x16 Video Card - OEM
Model #: 3DFW78256GTX
Western Digital Caviar SE WD1600JS 160GB 7200 RPM SATA 3.0Gb/s Hard Drive - OEM
Model #: WD1600JS
ASPIRE X-Infinity ATXB6KLW-BK/420 Black Steel ATX Mid Tower Computer Case ATX 420W power supply for AMD/Intel Power Supply - Retail
Model #: ATXB6KLW-BK/420
ASPIRE ATX-AS520W BLACK ATX 520W Power Supply - Retail
Model #: ATX-AS520W BLACK
TOSHIBA Black IDE DVD-ROM Drive Model sd-m2012c - OEM
Model #: sd-m2012c
The OS, speakers, keyboard, mouse, and monitor are taken care of.
Total Price: $1,117.78 (w/ shipping)