I currently have my PC overclocked, but I constantly switch it back and forth from default to OC'ed depending on what I am doing. I will tell you right now that if you decide to overclock, you will get spontaneous reboots and lock-ups while playing games.
I have sufficient cooling (7 case fans and a 6000rpm CPU fan) and it would still reboot while playing games sometimes.
Keep in mind, as you increase your FSB speed, you will have to increase your Vcore voltage (CPU voltage).
Let us know how it works.