You should definitely check those out.
This is what I'm thinking:
PNY VCQFX5500-PCIE-PB Quadro FX5500 1GB 256-bit GDDR2 PCI Express x16 Video Card - Retail - $2,399.99
mushkin 4GB(2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Dual Channel Kit Desktop Memory - Retail - $684.99
Seagate Cheetah 15K.4 ST3146854LW 147GB 15,000 RPM 8MB Cache SCSI Ultra320 68pin Hard Drive - OEM- $1,100.00
Intel Dual-Core Xeon 3.0 Paxville 3.0GHz 2 x 2MB L2 Cache Socket 604 Processor - Retail - $3,299.99
GIGABYTE GA-N680SLI-DQ6 LGA 775 NVIDIA nForce 680i SLI ATX Intel Motherboard - Retail- $349.99