Affordable Gaming Laptop

Hi guyz I'm kinda new here & in need of immediate help.
I have been offered a laptop by HP specs are:
3rd gen i7
8gb RAM
Intel HD 4000 Integrated
Nvdia GT 650M 2GB
Hybrid Drive of 750 GB and a full HD 15inch screen with a Blu-Ray Player
Now I'm intending to play heavy games do a little bit of programming (fresher at computer science engeneering) and it will be a dual booting machine running Win7 ultimate & Ubuntu side by side. Now suggest please and keep in mind the budget...