I've finally amassed my budget for this build and will be buying my system in the very near future. I am extremely excited to be moving off my slowly dying laptop and moving into a "new pair of shoes". So just wanted to run this build past you all. Thanks.
The one change I would seriously consider is getting this power supply instead:
Antec High Current Gamer 520W 80Plus Bronze £57 http://www.scan.co.uk/products/520w-antec-high-current-...
Mostly because of the higher efficiency, and it is based on a known platform; it is based on the Seasonic S12II Bronze design, which performs very well. Unfortunately it is not modular.
Another good option would be the SilverStone Strider Plus 500W 80Plus Bronze Modular £59 http://www.scan.co.uk/products/500w-silverstone-st50f-p...
Altho it's quality is not that well known, the Antec Basiq Plus may actually be better, except for the lower efficiency.
I looked at the Antec High Current Gamer when it first appeared on Scan a few weeks back. I couldn't find much out about it. But if it is based on the Seasonic S12II design I'd definitely sub that into the build. I'll have a little look into it.
(Not allowed to edit, so apologies for the double post)
Annoyingly my budget has been reduced as I haven't received money i believed I was supposed to. This has put my budget to just under £440. This is the new list I have worked out:
CPU: AMD Athlon II x3 450 3.2GHz Processor (eBuyer) £59.88