Thanks for the replies & welcomes!
Im buying this PC from a company because I have no idea how to build a PC, so Im not sure what brands will be used, I know they will be good though.
Ive decided to amend my spec anyway, its now...
Intel Core2 Duo E8600 3.33GHz
8GB CORSAIR DDR2 800MHz
ASUS P5Q
500GB ATA 3-Gb/s
2GB NVIDIA GEFORCE GTX285
700W QUIET QUAD RAIL PSU
22dBA TRIPLE COPPER HEATPIPE CPU COOLER
VISTA ULTIMATE x64
Thanks again.