You can never avoid a bottleneck in any PC all you can do is limit it.
That said what type of games do u want to play and at what resolution
that will have more effect on your performance needs then what cpu your running
I am planning to do some mild gaming like TF2, L4D2, and just simple games. Depending on which game it is I'm planning to run it at around 1280 x 720 - 1336 x 768.