I have a 100% Custom Self Built Machine
Athlon 64 3500+ (2.2ghz stock) @ 3900+ (2.53ghz) stock heatsink/voltage. s939
nForce 4 motherboard
1GB Dual-Channel DDR 466 RAM Clocked all the way at 466.
GeForce 6600 GT (500/1000 stock) @ 585/1210 with ramsinks and massive gpu heatsink.
200 GB SATA HDD
16x Dual-Layer DVD+/-RW Burner.
Athlon 64 X2 4800+
Dual 7800GTX in SLI
4GB DDR 533 RAM (for overclocking)
2x 76GB WD Raptors in RAID 0
2x 500GB Data Drives
BlueRay Dvd burner
All water cooled
Thats about $4000 if i built it myself, $6000 if i had it made by a pc company. And dell doesnt make anything that good