Will a Q6600 bottleneck a GTX 660 ti? What about OC'd?

Yeah i figured there would always be a little bottleneck at least, i'm planning on using a Coolermaster Evo 7 or a 212 for overclocking though, I don't want to go into watercooling territory, would 3.5 be stable enough?
 
OK thanks :) thinking of upgrading to a 3570K or even a 3770K (Video rendering so the hyperthreading helps) if i can later down the line
Although i could possibly get intel's newest chip out in 2013.
 


Its probably good advice. How can you say its the most optimal upgrade though? We don't know how much it will cost or how much better it will be if it is better.