Ok, so I'm looking for a processor to replace my crappy old Pentuim D. I've pretty much narrowed to down to either a Dual Core E2160 overclocked to about 3ghz or a stock Core 2 E4600. I am aware that the E4600 has a larger L2 cache, but i was wondering if the increase in clock speed would make up for that, or if the increase in cost would be worth any performance gain. I assume that the Core 2 is better, but how much?