Still need
PSU brand and model before we can go forward. Just to be safe and make sure you do not have a low quality one.
Ebuyer I was looking at either the
965 or
960T/. 960T has the possibility of unlocking to a six core CPU. If that doesn't interest you the 965 is the best bet.
GPU wise. I would be looking into either the 7850 or GTX 570. Entirely depends on pricing though. Need to get Vancha in here. Putting in UK in your title should help.