£1000 Budget

Hey guys, I've got a budget of around £1000 and am in need of a new laptop. I currently have a Sony VGN-AR61S which is getting very long in the tooth. I also have a desktop which is really showing its age (Intel Pentium G620 2.6ghz CPU, AMD Radeon HD 6800 Series GPU, 2gb RAM). I want to run the...