I would be glad to assist you in the process of getting a new computer, need a couple of pieces of info
1) What is your budget (absolute max)
2) What parts do you need (i.e can you reuse any of your existing parts(case, optical drives, keyboard etc)
3) Other than gaming, are there any other high end tasks you will need to do with it?
4) Can you build it or are you set on a prebuilt
With that info I would be much better off in giving you assistance