Last system checks

RAM should be 1.5 volt

GTX 970
's would be better IMO

PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor (£244.94 @ Aria PC)
CPU Cooler: Cooler Master Nepton 280L 122.5 CFM Liquid CPU Cooler (£79.98 @ Amazon UK)
Motherboard: Asus MAXIMUS VII HERO ATX LGA1150 Motherboard (£160.43 @ Aria PC)
Memory: Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-1866 Memory (£133.00 @ Ebuyer)
Storage: Samsung XP941 Series 256GB M.2-2280 Solid State Drive (£189.99 @ Amazon UK)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive (£35.94 @ Aria PC)
Video Card: Gigabyte GeForce GTX 970 4GB Video Card (2-Way SLI) (£260.36 @ Scan.co.uk)
Video Card: Gigabyte GeForce GTX 970 4GB Video Card (2-Way SLI) (£260.36 @ Scan.co.uk)
Case: Corsair 750D ATX Full Tower Case (£118.79 @ Aria PC)
Power Supply: SeaSonic G-750 750W 80+ Gold Certified Semi-Modular ATX Power Supply (£107.99 @ Amazon UK)
Operating System: Microsoft Windows 8.1 (OEM) (64-bit) (£71.60 @ Amazon UK)
Total: £1663.38
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-01-01 06:38 GMT+0000

Faster , uses less power , faster M.2 SSD
and cheaper