Enermax Liberty 400W ELT400AWT ATX2.2 Modular SLI Compliant PSU (CA-026-EN)
Price: £40.95 (£48.12 Including VAT at 17.5%)
Or
Seasonic S12 430W Silent ATX2.0 Power Supply (CA-000-SS)
Price: £43.99 (£51.69 Including VAT at 17.5%)
Nothing wrong with the liberties modular system, they are great PSU's. Couldnt find a 500W modular for £50, you would probably have to buy second hand. Those 2 will power your system fine but they arent to future proof as if you wanted to upgrade to xfire/sli you would be asking a bit much of them.
Or if you can stretch your budget a bit you get this PSU:
FSP Sparkle AX500-A Blue Storm 500W ATX2.0 PSU (CA-005-SK)
Price: £49.99 (£58.74 Including VAT at 17.5%)
BTW i like the sound of this am3 6000+, is it better than the conroes
