Hi guys

I've got an Asus P5N32-E SLI plus mobo with an E6600 CPU in it.
I've been thinking of upgrading but then I thought about overclocking instead.
The mobo has an "AI" overclocking feature where you can select a %age to overclock by and the mobo takes care of it.
ATM it's set to 5% and I'm getting (very stable) speed of 2.55GHz from the 2.4GHz CPU with the stock cooler.
I didn't want to go any higher with the stock cooler.
If I do decide to go higher is it worth using this AI feature or should I look at doing it all manually?
Cheers?