geofelt :
Once you get past a $120 cpu budget, Intel of some sort will generally be better for gaming.
Below that amd does well.
Here is one set of comparisons:
http://www.tomshardware.com/reviews/gaming-processor-frame-rate-performance,3427-9.html
I would say once you hit $200 really.
The 8350 is as good as any i5, especially depending upon the game/task.
The 6350 is similar to an i5 for FAR less money...
The 6300 is better than any i3 for the same/more money.
The FX 4300/4350 is typically about i3 performance in games and better in productivity for less money.
Where you are right is the $200-250+ CPUs. (Which I would argue not to spend the money on anyway...though some will)