Don't upgrade your CPU Dr. Light...not for gaming purposes, anyway. If you wanna bench higher - than sure! 
But really, you should OC. It's safe. Intel even sells insurance for it if you're that nervous! http://click.intel.com/tuningplan/

But really, you should OC. It's safe. Intel even sells insurance for it if you're that nervous! http://click.intel.com/tuningplan/