For £1,000 or precisely £985.18 you can get this
http://uk.pcpartpicker.com/p/2lU0w plus the case here http://www.scan.co.uk/products/sharkoon-t28-black-green-mid-tower-case-with-usb-30-3x120mm-led-fans-with-side-window-w-o-psu.
Have a look and let me know what you think. I tried to stick with your original plans and only made a couple of small changes. The ram i changed to G.Skill and the i changed the hard drive configuration.
You picked a 2TB WD WD20EZRX Green edition hard drive and i picked a Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive plus a Samsung 840 EVO 250GB 2.5" Solid State Disk drive.
The solid state drive would be to install your operating system and games/software on and the mechanical hard drive would be for storage.
I thought as you would have a high performance computer you might want a solid state drive as they make the whole computer feel snappier and decrease loading times.
Obviously it's your computer and your decision so let me know what you think and maybe we can change anything your not happy with

Also something you might want to consider is an aftermarket cooler for your CPU especially as it's an unlocked CPU which can be overclocked very easily. I can recommend one if you want.
I also didn't include a dvd drive as i didn't know if you have one but they are very cheap.