I did a bit of tweaking and came to this:
PCPartPicker part list:
http://uk.pcpartpicker.com/p/2MEVL
Price breakdown by merchant: http://uk.pcpartpicker.com/p/2MEVL/by_merchant/
Benchmarks: http://uk.pcpartpicker.com/p/2MEVL/benchmarks/
CPU: AMD FX-8320 3.5GHz 8-Core Processor (£107.99 @ Aria PC)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£25.18 @ Aria PC)
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard (£63.56 @ Scan.co.uk)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£63.50 @ Amazon UK)
Storage: Sandisk 64GB 2.5" Solid State Disk (£39.50 @ Amazon UK)
Storage: Samsung Spinpoint F1 DT 750GB 3.5" 7200RPM Internal Hard Drive (£34.99 @ Overclockers.co.uk)
Video Card: Zotac GeForce GTX 760 2GB Video Card (£174.98 @ Dabs)
Case: NZXT Source 210 Elite (Black) ATX Mid Tower Case (£38.65 @ Scan.co.uk)
Power Supply: Corsair CX 600W 80+ Bronze Certified Semi-Modular ATX Power Supply (£53.61 @ Amazon UK)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer (£11.92 @ CCL Computers)
Total: £613.88
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-02-03 21:32 GMT+0000)
You could remove the optical drive of course if you have one to re-use (I noticed you don't have one listed in your build).