I agree with the sentiment of spending as much as possible on the graphics card in a pure gamer, provided the CPU is powerful "enough." For example, I probably would not drop back all the way to a FX-4300, unless benchmarks of the specific games I'd be playing show it is enough.
That said, in my particular case, most of my gaming has become older and/or casual titles (the HD7750 has been enough, most of the time), so a fast CPU can be nice. It really depends on how much time you'll spend gaming, and which games you'll be playing. You'll also need a stronger graphics card if you want to play games across multiple monitors, and a stronger CPU if you want to stream your games while you are playing.