What Is a good PC Mic?

I'm starting to get into PC gaming, and I need a mic. When I play co op games, like portal, and minecraft with friends, we talk on Skype, and i thought i could just use my turtle beach x11's, which were meant for xbox, but do work on the PC. The problem is, my friend told me he was hearing a bunch of static, and could barely hear me, even with the mic really close to my mouth. I want a new mic for my PC, does anyone know of a good one i can easily use on skype, thats 50 dollars or less? thanks