Here if you REALLY want to go with AMD
PCPartPicker part list:
http://uk.pcpartpicker.com/p/rZD8sY
Price breakdown by merchant: http://uk.pcpartpicker.com/p/rZD8sY/by_merchant/
CPU: AMD Athlon X4 860K 3.7GHz Quad-Core Processor (£56.04 @ Aria PC)
CPU Cooler: Cooler Master Hyper TX3 Evo 43.1 CFM CPU Cooler (£16.48 @ CCL Computers)
Motherboard: Gigabyte GA-F2A88XM-D3H Micro ATX FM2+ Motherboard (£47.71 @ Amazon UK)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£52.98 @ Amazon UK)
Storage: Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive (£55.99 @ Amazon UK)
Video Card: Gigabyte Radeon R9 280 3GB WINDFORCE Video Card (£139.98 @ Amazon UK)
Case: NZXT H230 (White) ATX Mid Tower Case (£54.28 @ Scan.co.uk)
Power Supply: XFX 550W 80+ Bronze Certified ATX Power Supply (£46.79 @ Aria PC)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer (£10.50 @ CCL Computers)
Total: £480.75
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-02-26 05:47 GMT+0000
I'll do an Intel build too.