aha, yeah, i'll need a water cooling system if i wanna overclock, sure, except i don't know about overclocking, and i've been to some forums explaining it, it had a post that was as long as psymon's BAIN installation package thread, all 5 posts added together...lots of reading, so i just decided that stock speed is fine until i really can't live with it.
It's incredibly easy, if you don't push it too hard. Besides, that can be a bit risky, especially if you're new to it all.
But anyway, you *do not* need water cooling to overclock safely and effectively. I've been running an e8400 at 4GHz (up from 3) for nearly two years now; rock solid, cool, and still a decent performer, actually. Hence, I've not bothered to upgrade just yet. Oh, and that's with a cheap HSF (heatsink + fan), to replace the stock cooling (i.e., the crappy HSF that CPUs come with by default). Plus, I suppose I have a reasonably good case, though not an expensive one. It provides decent airflow, which is important. The other thing you will need is a reliable PSU (power supply) with sufficient, well, power. Because OCing does demand more of that. A poor quality and/or underpowered PSU is a terrible idea in general, and doubly so when overclocking.
There are some very simple, straightforward guides out there. I recommend starting with a mild overclock, testing for temperature and stability every step of the way. A
bit like adding lots of mods, now I think of it...