Here build for yah

motherboard: any p35 board i will recommend gigabite Ep38 ds3L
os: windows xp 64 bit don't waste your time with vista
case: i like coolmaster cosmos 1000
graphic: get evga 8800 gts
proccesor: Quad core Q6600 with go setting
make sure you buy cpu fan if you want to overclock your processor. and any other shit i gess like ram that support your motherboard.