Processor

So, how does one go about choosing a processor? I've decided to build a computer to familiarize myself with hardware, and this is really the one thing I know nothing about. My mobo is AM2, and I'm thinking of getting a dual core. But beyond that, I'm lost. HALP?

AMD suck arse at this point in time.

Intel Core 2 Duo E6600 (you can overclock the fuck outta these too) + 1Ghz FSB mobo + 1Ghz RAM

Now you're set.