You can cut a little cost by going with the OEM version of windows and possibly find a slightly better PSU (that one is only 80+, maybe find 80+silver if you can), and if you aren't planning on crossfire, you can drop down to a 600W
You have a nice list of components. I don't think you should change a thing except to go with 1600 MHz ram instead of the 1333. I have the same motherboard and I use the Corsair Vengeance 1600 in blue because the motherboard is blue and it's $50.00 USD for 8gbs. http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Honestly, id downgrade the CPU in that build. If you're building a gaming PC then you wont need something that good, going for something in the £100 range will do you just fine. And if you do that you could also downgrade your motherboard to something in the £100 pound range. On a gaming PC it is unlikely that your CPU is gonna cause a bottle neck.
Which brings me to my next recommendation for saving money, which is to not get the SSD drive. They do make things start up faster, but i honestly dont think you'll get enough in-game improvement to warrant the 150 quid you're gonna spend on it. Maybe got for http://www.scan.co.uk/products/500gb-seagate-st500dm002... too boot stuff from? Or if you really want an SSD drive to boot from then you could get away with a much cheaper 60gb one instead of a 120gb.
You could save a few quid by just getting a bog standard dvd player for <15 quid, but that depends on how much blu-ray you're planning on using.
Also, bear in mind your case comes with 3x120mm and 1x200mm fans, so you probably dont need to buy anymore.
I have made amendments taking in all of your expert advice.
I am very keen to keep the same CPU and Motherboard.
I will stick with my own GPU for now and look at upgrading when the 7 series is out, maybe this would justify the more expensive board and CPU on the initial build. Although maybe they won't be compatible (really struggled to understand if this was or wasn't the case, doesn't bode well I know)
Lowered the SSD size (great point only having OS and maybe 2 mmo's on it and few little bits)
Ditched the Blu-ray, no rush here in time maybe.
Ditched the extra fan.
And also changed the Hard Drive again valid and good point from Elessar_dan.
Changed the Monitor.
Please feel free to comment further, but the amended build as follows: