£400 computer (UK)

What are the best computer components for £400 all in (including windows 7) I would like to be able to play games.

http://uk.pcpartpicker.com/p/1dcgO

CPU: AMD Phenom II X4 965 Black 3.4GHz Quad-Core Processor (£63.59 @ Aria PC)

Motherboard: Gigabyte GA-78LMT-USB3 Micro ATX AM3+ Motherboard (£38.54 @ CCL Computers)

Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1333 Memory (£39.99 @ Amazon UK)

Storage: Western Digital Caviar Blue 500GB 3.5" 7200RPM Internal Hard Drive (£39.00 @ Amazon UK)

Video Card: Sapphire Radeon HD 7770 GHz Edition 1GB Video Card (£81.93 @ Ebuyer)

Case: NZXT Source 210 Elite (White) ATX Mid Tower Case (£37.32 @ Scan.co.uk)

Power Supply: XFX 450W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£34.99 @ Maplin Electronics)

Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£13.15 @ Amazon UK)

Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) (£68.35 @ CCL Computers)

Total: £416.86

I would say this http://uk.pcpartpicker.com/p/1dcnd