I must say I enjoyed the witty replies.
On to your question. If you are not using any cpu heavy tasks, then you will not see any difference in speeds.
You have not specified what you are using your computer for, but I am guessing it is probably playing games and surfing. In that case, current generation games are mostly more dependant on graphics cards, and surfing will not tax any modern processor in the slightest.
I would advise to keep your current processor. If it isn't fast enough right now, you may want to specify what itis you are using it for. Overclocking may be a better solution given your hardware. You would most likely want a third party HSF then though...