Here is what ive come up with so far;
Intel core i7-3930K
Asus P9X79 PRO Motherboard
Not worth it. Games just plain don't use the extra two cores, so you'll save a fair bit by sticking with 3570K and Z77, with no loss of performance.
Check my post on page 1 for other component selections. There's a lot of things to put that money towards.
Corsair 16GB 1600MHz
CoolerMaster Silent Pro M1000
Samsung RAM is better.
For PSU, take Corsair HX650V2, it should be better built and has well enough power. Or AX850 if you really want the best for the sake of it alone.
I have just over £300 left, any suggestions for hard drive? Cooling? Also im not sure what cables come with these products so is it best to buy them aswell? Case?
A lot like my previous suggestions:
Cooling - Thermalright Macho HR-02 or NZXT Havik 140
Drive - Crucial m4 256GB for OS and games and WD Green or Samsung 2TB HDD for video, storage, etc
Case - Antec P280 or Fractal Design XL
There are some other good cases on the market, but they're not as quiet.
All cables come bundled and work just fine, no need to buy any.
Also, X-Fi Titanium sound card - if you have or plan on buying any decent speakers.
See for other peripherals.