As much as it hurts me to say it, since I always loved and bought AMD ...
Even an i3-2100 can beat most AMD CPU's out there when it comes to gaming. And it's available for ~125$
And that's the slowest i3 available @3.1 GHz, there's also a i3-2130 @3.4 GHz for ~150$
Here's an i3 2100 vs the FX 8150, scroll down to the game benchmarks, they are extremely close, with the i3 even ahead in some. And that's vs a 270$ CPU.http://www.anandtech.com/bench/Product/289?vs=434
And some chart to considerhttp://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-5.html