How  about these tweaks
PCPartPicker part list: 
http://uk.pcpartpicker.com/p/JZFYRB
Price breakdown by merchant: 
http://uk.pcpartpicker.com/p/JZFYRB/by_merchant/
CPU: Intel Core i7-4790K 4.0GHz Quad-Core Processor  (£236.34 @ Aria PC) 
CPU Cooler: Corsair H100i 77.0 CFM Liquid CPU Cooler  (£78.73 @ Amazon UK) 
Motherboard: Asus MAXIMUS VII RANGER ATX LGA1150 Motherboard  (£124.00 @ Aria PC) 
Memory: Corsair Vengeance 16GB (2 x 8GB) DDR3-1600 Memory  (£117.79 @ Scan.co.uk) 
Storage: Crucial MX100 512GB 2.5" Solid State Drive  (£149.20 @ Aria PC) 
Video Card: MSI GeForce GTX 780 Ti 3GB TWIN FROZR Video Card  (£489.59 @ Overclockers.co.uk) 
Case: Corsair Air 540 ATX Mid Tower Case  (£98.95 @ Amazon UK) 
Power Supply: EVGA 850W 80+ Gold Certified Fully-Modular ATX Power Supply  (£94.99 @ Amazon UK) 
Total: £1389.59
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2014-08-16 14:19 BST+0100
I have stuck with the MoBo as i have heard good things about the on board sound so i shouldn't need an additional sound card and its only £25 more than the gigabyte. I have changed the PSU to a cheaper version but not gone as low as the 650 just in case i choose to SLI in future. I could save an additional £15 by reducing the 850 to a 750 PSU.
Have I gone overboard on the GPU?
In terms of fans I was thinking of going with the  3 Corsair 140s for the case and 2 corsair static pressure for the radiator do the LED versions impede performance i.e. are they a gimmick and i should just stick to LED strips?