Doesn't look bad at first glance.
I made a selection myself to give a imo better motherboard,case,psu,also added a nice cooler for some overclocking if you're up for that.A better cooler than stock anyway,especially for that price.
PCPartPicker part list
CPU: AMD FX-6300 3.5GHz 6-Core Processor (£74.34 @ Aria PC)
CPU Cooler: Zalman CNPS10X OPTIMA CPU Cooler (£17.98 @ Scan.co.uk)
Motherboard: MSI 970 GAMING ATX AM3+ Motherboard (£69.56 @ Scan.co.uk)
Memory: G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866 Memory (£68.12 @ Amazon UK)
Video Card: MSI Radeon R9 280 3GB TWIN FROZR Video Card (£146.74 @ Scan.co.uk)
Case: Corsair SPEC-03 Red ATX Mid Tower Case (£45.81 @ Amazon UK)
Power Supply: XFX 650W 80+ Bronze Certified Semi-Modular ATX Power Supply (£60.86 @ CCL Computers)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer (£10.09 @ CCL Computers)
Total: £493.50
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-10-19 00:31 BST+0100
The cooler comes just with a little "bag" of cooling paste,enough for one time,you might want to add the next to the list,
http://uk.pcpartpicker.com/part/arctic-cooling-thermal-paste-acmx4
For how the gpu i chose does in for instance BF4,
http://www.xbitlabs.com/articles/graphics/display/msi-r9-280-gaming-3g_7.html#sect3
with no AA should you get good fps,playable fps anyway. Some results are overclocked,keep an eye on that and read the whole review.They use a different cpu so this will affect fps also.