so should i do a radeon 7850 with an amd phenom II x4?
You get the idea.
Pair a $100 phenom II X4 with a $200 7850.
But, at every price point, an Intel cpu will be the better gamer, even if it may be a dual core.
Read this article:http://www.tomshardware.com/reviews/gaming-fx-pentium-apu-benchmark,3120.html
I think something like a i3-2100 would be better.
Nvidia will soon announce a GTX660 and perhaps a GTX650 which will compete in the same price bracket as the 7850.
You might want to wait a week to check them out.
It seems that retailers are clearing out 7850 cards; I think they know something.