Erm just the normal one http://www.scan.co.uk/Products/1GB-...-Clock-1350MHz-336-Cores-2x-DL-DVI-I-MiniHDMI eVGA don't mind if you OC it anyway but I don't think I will at least not straight away! Also what OS shall I go for I'm thinking of 32bit since many games won't be supported maybe?
games are supported in 64-bit since 64-bit can also run 32-bit applications. you may have trouble running really old games i.e. 7+ years but generally everything works. going 32-bit will only gimp your system anyway since you have chosen 4GB of RAM and a 768MB GPU There is no reason why any new build should be 32-bit now unless you know you have 16-bit software or some really old and incompatible devices.
Ok will go 64-bit and will be updating the rest here http://forums.bit-tech.net/showthread.php?t=196149 All parts have been ordered.