|"overclocking will give you very little if any more performance and the danger that comes with it is much greater"|
100% incorrect. Overclocking can reap HUGE performance benefits & as long as you know what you're doing & are sensible about it, there's little or no danger. All modern CPUs (both AMD & Intel) have built-in thermal protection. It's virtually impossible to overheat a modern CPU to death, however, you CAN kill a CPU by overvolting. Once again, if you're sensible about it, you will have no problems.
Unfortunately, your board is based on a crappy VIA chipset. The BIOS doesn't support all the overclocking features you need to get the most out of your CPU, but you can at least overclock it somewhat. The 2 main things you need to keep in mind are: 1.) the faster the FSB, the better the performance, 2.) always try maintain a CPU:DRAM frequency ratio of 1:1 or 1:2 .
One good thing about the E5200 is that it has a high default multiplier of 12.5x meaning that you have numerous possible clock configurations. The settings you need to tweak will be found in the Performance Booster Zone menu. Your board offically supports up to 1066MHz FSB (266MHz frequency), so with any luck, you should be able to hit 3.067GHz (11.5 x 266MHz) without any problems & without increasing the CPU voltage. Unfortunately there is no CPU voltage adjustment or you would be able to clock the CPU much higher. Make sure to adjust the RAM to run at 266MHz (DDR533) as well, even if you have DDR2-667 or DDR2-800. Lock the PCIe at 100MHz & disable Spread Spectrum.
It would help to know the speed of your RAM because there are other possibilities. For example: 3.167GHz (9.5 x 333MHz) with RAM at 333MHz (DDR667) or 3.2GHz (8 x 400MHz) with RAM at 400MHz (DDR800).
EDIT: I just noticed something. The E5200 is NOT on the CPU support list: