Thanks for your reply (+rep).. I think with everything including a case etc, and built with win7 it's around the £1200 mark.
Chillblast is a company that build PC's (UK), so I think it's there own white label cooler.
I know I could build him it for less, but every time he comes over here he sees my tinkering with mine!! I built a £1000ish system for around £600, but he also gets a two year warranty with this, and the cpu is pre overclocked.