Need advice for this Gaming build.

Hey guys  , here is my brothers build:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-2500K 3.3GHz Quad-Core Processor (£155.99 @ Aria PC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£24.99 @ Amazon UK)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£49.14 @ Aria PC)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£47.99 @ Aria PC)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£12.98 @ Scan.co.uk)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (32-bit) (£65.64 @ Scan.co.uk)
Total: £356.73
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-02-12 17:32 GMT+0000)

He wants a 7950(a good completely overclockable one),a black and red case, black and red mobo, decent RAM for overclocking (low profile preferably)and it has to all be their under £700-give or take £5....

I hope you guys can help as you helped me with my build   thank you and goodbye!