Here's the cheapest one in the result i found for prebuilt PCs (No monitor)
http://www.amazon.co.uk/Sedatech-Ultimate-FX-4100-4x3-6Ghz-Geforce/dp/B005FWWQQY/ref=sr_1_1?s=computers&ie=UTF8&qid=1337188857&sr=1-1
if not here are the rest of the result and you guys could tell me which is good, it would really help if you guys gave feedback.
http://www.amazon.co.uk/gp/search/ref=sr_nr_n_4?rh=n%3A340831031%2Ck%3Apc+game+ultimate%2Cn%3A!340832031%2Cn%3A428651031&bbn=340832031&keywords=pc+game+ultimate&ie=UTF8&qid=1337188841&rnid=340832031#/ref=sr_st?bbn=340832031&keywords=pc+game+ultimate&qid=1337188849&rh=n%3A340831031%2Ck%3Apc+game+ultimate%2Cn%3A!340832031%2Cn%3A428651031&sort=price
http://www.amazon.co.uk/Sedatech-Ultimate-FX-4100-4x3-6Ghz-Geforce/dp/B005FWWQQY/ref=sr_1_1?s=computers&ie=UTF8&qid=1337188857&sr=1-1
if not here are the rest of the result and you guys could tell me which is good, it would really help if you guys gave feedback.
http://www.amazon.co.uk/gp/search/ref=sr_nr_n_4?rh=n%3A340831031%2Ck%3Apc+game+ultimate%2Cn%3A!340832031%2Cn%3A428651031&bbn=340832031&keywords=pc+game+ultimate&ie=UTF8&qid=1337188841&rnid=340832031#/ref=sr_st?bbn=340832031&keywords=pc+game+ultimate&qid=1337188849&rh=n%3A340831031%2Ck%3Apc+game+ultimate%2Cn%3A!340832031%2Cn%3A428651031&sort=price