I would change just one thing...
Power Supply: Corsair CX 430W 80+ Bronze Certified Semi-Modular ATX Power Supply (£41.00 @ Amazon UK)
Regardless of what people say I think if you add up the power required you will be at the max very quickly. TBH I would say look for a 700W -750W just in case you add a DVD/BR RW, internal drives, SSD and normal HD's.
I know my processor uses 125W and I have 4 HD's plus burner for my Blu-rays. I had a 550W PSU and it lasted 4 weeks.
They say that it will run your system, but do you really want to take a change?
OK seriously, can you all just WATCH THIS. PLEASE.
[video=youtube;zKcRDbsWoP8]https://www.youtube.com/watch?v=zKcRDbsWoP8[/video]