Intel Core i5-3570 3.4GHz Quad-Core Processor £155.94
Gigabyte GA-Z77X-UD5H ATX LGA1155 Motherboard £163.99
Corsair Dominator Platinum 16GB (2 x 8GB) DDR3-1866 Memory £162.10
Zotac GeForce GTX 680 2GB Video Card (2-Way SLI) £411.20 £411.20
Zotac GeForce GTX 680 2GB Video Card (2-Way SLI) £411.20 £411.20
EVGA SuperNOVA 650W 80 PLUS Gold Certified ATX12V / EPS12V Power Supply £85.45
You have it all wrong sir!
Your money should go towards Good graphics cards (AMD is WAY better than Nvidia for mining purposes) and a good reliable PSU.
Take a look at my post a couple up from yours... ^
You shouldn't be spending a ton of money on CPU and RAM.
I recommend a Corsair or Cooler Master for PSU 80 plus of course and 650w is a good number if you plan to only have 2 FX cards