Just built a gaming system for my son as follows:
MSI P6N Diamond mobo
Core2 Quad Q6600 CPU @ 2.4GHz
2 x 2Gb DDR2 RAM PC6400
2 x 8800GT in SLi
Silverstone Strider 750W fully modular PSU SLi/Crossfire ready
Antec 900 case (brilliant case, bought from PLE along with CPU)
SATA Pioneer DVDRAM burner
3 x IDE to SATA converters for the IDE HDDs
Monitor, keyboard, mouse & HDDs from old system installed into above, cost was just under $2000. Sourced from eBay USA (Mobo), eBay Taiwan (RAM), online computer shop Sydney (8800GTs), eBay HK (converters), local shop (DVD burner), PLE (CPU & PSU).
Saved about $700 over normal retail!!
Build your own if ya wanna save $$$
