Pretty much any local PC / laptop repair shop will build your PC for you after you order the components for a small fee. Some even make house calls. Otherwise look at PC Specialist. What's your budget, what will be the primary use(s) of your PC and what is your resolution or do you require a monitor?I was just wondering if anyone knew of somewhere here in the UK, where you could pick the parts and they'd do the building.
I could go no higher than about £4000 (monitor and Windows incl) monitor resolution would be 2560x1440 Primary uses would be gaming, browsing, and streaming media.