My build parts

Hi there i'm thinking about building a new system, everything here is what i need, have a budget of around £400-£500.
any advice would be much appreciated, thank you  

MB:
http://www.scan.co.uk/products/gigabyte-ga-970a-ds3-amd...(x16)-atx

CPU:
http://www.scan.co.uk/products/amd-phenom-ii-x4-965-bla...

RAM:
http://www.ebuyer.com/342352-crucial-8gb-ddr3-1600mhz-b...

GPU:
http://www.scan.co.uk/products/2gb-xfx-radeon-hd-7850-c...

HDD:
http://www.scan.co.uk/products/1tb-toshiba-dt01aca100-(7k1000d)-35-hdd-sata-iii-6gb-s-7200rpm-32mb-cache

PSU:
http://www.scan.co.uk/products/650w-corsair-enthusiast-...

CASE:
http://www.ebuyer.com/343262-cit-vantage-gaming-case-bl...