Please consider how much more GPU you can get if you don't fall prey to the i7 build above. It is very inefficient in terms of parts selection. This will perform better in gaming:
PCPartPicker part list / Price breakdown by merchant
| Type | Item | Price |
|---|---|---|
| CPU | Intel Core i5-4460 3.2GHz Quad-Core Processor | £138.52 @ More Computers |
| Motherboard | MSI Z97S SLI Krait Edition ATX LGA1150 Motherboard | £89.96 @ Scan.co.uk |
| Storage | PNY CS1111 120GB 2.5" Solid State Drive | £37.63 @ CCL Computers |
| Storage | Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive | £39.98 @ Scan.co.uk |
| Video Card | Asus Radeon R9 Fury X 4GB Video Card (2-Way CrossFire) | £525.14 @ Dabs |
| Video Card | Asus Radeon R9 Fury X 4GB Video Card (2-Way CrossFire) | £525.14 @ Dabs |
| Case | Phanteks Enthoo Pro M ATX Mid Tower Case | £57.98 @ CCL Computers |
| Power Supply | EVGA SuperNova B2 850W 80+ Bronze Certified Semi-Modular ATX Power Supply | £80.71 @ Amazon UK |
| Prices include shipping, taxes, rebates, and discounts | ||
| Total | £1495.06 | |
| Generated by PCPartPicker 2015-10-02 15:21 BST+0100 |
I could also build a SLI 980 ti setup for much the same price if you are interested. Both would go well with a 1440p synced monitor.