Spec for £800 full system

[ali825]

hiya my friend just came round and want to buy a pc from overclockers to build him self, i was wondering if you guy could spec him a rig for around about £800.
he wants the pc for gameing primaly, his requiremts are:

500gb harddive
4gb of ram
pls can you inculue the os in the budget
he is willing to overclock
would like a 22inc screen

is it worth him getting quad core or just stick to duo core to save some cash since not many games unitlies it

thx so much for your help

 

[ali825]

what your reasoning for going for amd over intel

 

[ali825]

just wondering why ever one going for amd rather than intel, is intel not better for overclockering, also would you guy be able to factor the os so may be the budget should be £730, he is thinking of use the beta then buy the os when windows seven comes out