You don't mention what you have for a graphics card, or what games you are interested in playing, but I'll way in with an opinion anyway. I would say that unless you have an uber 8800GTX, your not going to be CPU bottlenecked. That said if you play a low resolutions or you are playing SupCom, your CPU will bottleneck your system.
In general I would think that your CPU would be enough to handle most games. If you are struggling you can always OC if you're confident with that.