So you are finally realising the downside of overclocking
Unless you actually need all that processing power, and are actually using it, then overclocking CPUs is just willy-waving at the cost of an increased electricity bill. I have my computer on nearly 16 hours a day, if not more, and I just don't see the point of overclocking my Q6600 past 3GHz. My CPU is using 120 Watts as it is, and that starts going up pretty quickly once you get past the 3GHz stage, as you have to start upping voltages.
I guess the best thing to do is just have a bios profile (or whatever) for stock/moderate overclock for general use with all the power saving enabled, and save your superclocked-zero-power-saving profile for when you really need it when playing games, etc.