As long as you have a mid range CPU, you'll usually do fine gaming wise. Spend more time choosing your GPU. CoD Ghosts will probably run on the same old crappy engine and so be easy to run.
For the bottle necking issue, i don't think it will.
I'm thinking on getting the amd fx 6350 maybe but I'm also going to get the 9xxx volcano series when it comes out in early september is that good enough?