PCPartPicker part list:
http://pcpartpicker.com/uk/p/r6Ux
Price breakdown by merchant: http://pcpartpicker.com/uk/p/r6Ux/by_merchant/
Benchmarks: http://pcpartpicker.com/uk/p/r6Ux/benchmarks/
CPU: Intel Core i5-3470 3.2GHz Quad-Core Processor (£145.38 @ Scan.co.uk)
Motherboard: Asus P8Z77-V LX ATX LGA1155 Motherboard (£82.52 @ Scan.co.uk)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£32.16 @ Scan.co.uk)
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive (£69.99 @ Ebuyer)
Video Card: Asus GeForce GTX 660 Ti 2GB Video Card (£230.98 @ Amazon UK)
Case: Fractal Design Arc Midi Tower ATX Mid Tower Case (£68.94 @ Scan.co.uk)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£49.98 @ Novatech)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£12.92 @ Scan.co.uk)
Total: £692.87
(Prices include shipping, taxes, and discounts when available.)
It has 2 TB HDD and a better gpu (660 ti gtx nvidia), no need for such expensive mobos, i put a good asus one.