PCPartPicker part list:
http://uk.pcpartpicker.com/p/3oPFO
Price breakdown by merchant: http://uk.pcpartpicker.com/p/3oPFO/by_merchant/
Benchmarks: http://uk.pcpartpicker.com/p/3oPFO/benchmarks/
CPU: AMD FX-6300 3.5GHz 6-Core Processor (£75.00 @ Amazon UK)
CPU Cooler: Cooler Master Hyper TX3 Evo 43.1 CFM CPU Cooler (£16.00 @ Amazon UK)
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard (£61.99 @ Amazon UK)
Memory: Kingston Beast 8GB (2 x 4GB) DDR3-1600 Memory (£53.00 @ Amazon UK)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£35.94 @ Aria PC)
Video Card: MSI GeForce GTX 760 2GB Video Card (£169.98 @ Amazon UK)
Case: Cooler Master K380 ATX Mid Tower Case (£37.28 @ Aria PC)
Power Supply: Corsair CX 500W 80+ Bronze Certified Semi-Modular ATX Power Supply (£45.98 @ Amazon UK)
Total: £495.17
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-04-09 16:56 BST+0100)