So I did a post over at the build log section of the forums and a lot of you guys recommended for me to get the AMD Radeon 7790.
LINK TO THAT POST: http://linustechtips.com/main/topic/31025-budget-uk-gaming-pc-%C2%A3350-%C2%A3370/#entry397062
So now that we've chosen the 7790 we are not sure whether to get the MSI version or the Saphire version due to the fact that they are both priced the same in the UK (on amazon)
MSI: http://amzn.to/1b8nCIg
SAPHIRE VERSION: http://amzn.to/10A8KOy
So I am amusing that that MSI one has better performance because it's overclocked but I am unsure. As you can see from the link they are both £110 and the two questions I have is which gives the best performance and also which is the quietest.