This is what I have in mind, not 100% sure which graphics card however.
Intel Core i5-4670k - £161 (will likely OC it to around 4.2ghz to be safe, i'm not an enthusiast so I don't feel the need to take it higher)
Alpenfohn K2 Mount doom heatsink - £50 (should be more than enough for the above OC)
MSI Z87-G43 DDR3 ATX Motherboard - £92
Corsair Vengeance Pro Silver 16GB DDR 1866mhz ram - £149
Samsung 250GB 840EVO SSD - £120 (will likely be my main games drive, I have a 120gig SSD already to use as a boot drive for windows and a 2TB SSHD to use for other games/storage)
Corsair AX760W modular PSU - £92
Corsair Carbide 300R case - £70 (really like the look of this, seems like its very spacious and has great airflow)
4x Corsair Air Series AF140mm 1200RPM quiet edition fans for the case - £44
That's the basics I had my eye on, any recommendations for graphics card? i was torn between
AMD 290x (temps they get to really put me off though and I won't be water cooling)
GTX 770
GTX 780 (leaning towards this more than the others at the moment)
GTX 780Ti (only slightly better than a GTX 780 according to most benchmarks and the price increase is massive considering the tiny increase, almost £200 more in some cases)