PCPartPicker part list:
http://uk.pcpartpicker.com/p/1NXgB
Price breakdown by merchant: http://uk.pcpartpicker.com/p/1NXgB/by_merchant/
Benchmarks: http://uk.pcpartpicker.com/p/1NXgB/benchmarks/
CPU: Intel Core i7-4770K 3.5GHz Quad-Core Processor (£245.99 @ Aria PC)
Motherboard: Asus SABERTOOTH Z87 ATX LGA1150 Motherboard (£177.98 @ Dabs)
Memory: Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-2133 Memory (£148.99 @ Scan.co.uk)
Storage: Samsung 840 EVO 120GB 2.5" Solid State Disk (£73.99 @ Amazon UK)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£44.71 @ Aria PC)
Video Card: Asus Radeon R9 280X 3GB Video Card (2-Way CrossFire) (£305.42 @ Dabs)
Video Card: Asus Radeon R9 280X 3GB Video Card (2-Way CrossFire) (£305.42 @ Dabs)
Case: Corsair 300R ATX Mid Tower Case (£59.90 @ Amazon UK)
Power Supply: Fractal Design Tesla R2 800W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply (£89.38 @ Dabs)
Total: £1451.78
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-10-12 22:05 BST+0100)