Im getting an upgrade for mine. Basically im getting it new, i will change all parts inside case.
From: TigerDirect.com
Intel Core 2 Duo E6750 Processor BX80557E6750 - 2.66GHz, 4MB Cache, 1333MHz FSB, Conroe, Dual-Core
Mach Speed MS945G-GLV Motherboard - Intel Socket 775, MicroATX, Audio, Video, PCI Express, Gigabit LAN, USB 2.0, Serial ATA
Seagate Barracuda 7200.10 250GB Hard Drive - 7200, 8MB, Serial ATA-300, OEM
XFX GeForce 8600 GT / 512MB DDR2 / SLI Ready / PCI Express / DL Dual DVI / HDTV / Video Card
Upgrade total: 600$ dollars
+ Parts i already have
Clear side case
ThermalTake Big Water 760i Liquid Cooling System Kit, with this i can overclock my cpu
2GB Corsair DDR2 Dual channel, 800 Mhz
80 GB Hitachi Hard Drive