Buildityourself dot com
newegg
zipzoomfly
sundialmicro
chiefvalue
Mushkin 550 watt
E6400 (Artic Silver 5 + tuniq tower or scythe ninja or XP-90/120, + 120MM Fan)
ASUS P5B E
eVGA 8800GTS
G Skill DDR2 667 2 GB ( 2 X 1 GB)
Audigy 2 ZS or X-fi
320 GB Seagate 16 MB Cache SATA
Optorite 16X DVD-RW
Widescreen Hanns G or sceptre or Samsung
Pick a nice big case (Antec, silverstone, li lian, TT, Cool Master)