Think I'm going to get an i5 2500. Great company in the UK sells bundles, so it comes overclocked from 3.30GHz to 4.4GHz, with a Corsair A50 CPU cooler, a Gigabyte Z68AP-D3 and 8GB Corsair Vengeance Blue Low Profile ram.
All that is £355, which is pretty awesome. The SSD will cost another 100ish, as I want a 120GB one. For Windows 7, PS, Lightroom and a couple games with some spare space.
Got a link mate? I'm in the market for a desktop that satisfies my gaming needs ;-)