HELP ME. Looking for a prebuilt gaming pc

[kyleog21]

Here in a month i am going to be looking for a prebuilt gaming pc. i want the pc to be able to run diablo 3, csgo, wow, and league of legends and maybe bf3 on the ultra settings. I dont know enough about computers to build one on my own. my budget is around 800-1000 dollars. maybe being able to go over 1000 a little bit. i dont need a moniter just a tower. i would prefer a i7 and not the amd but if someone could convince me i would consider it. i need help.

 

[kyleog21]

Sorry i almost forgot i dont care if it is windows 7 or 8