Friends, if this topic has appeared previously, please pardon my repeat. I searched a bit in this section for such a topic and didn't find one exactly dealing with the basic question: Can anyone recommend the easiest and most affordable mic that can be plugged into the pc usb port and used for recording acoustic guitar?

Currently, I use the internal mic on my pc video cam - it's ok but pretty crude. I have bought other mics for pc that are only intended for computer use, like chat etc... but they did not work very well. I need something a little more designed for picking up acoustic guitar but pluggable to pc - any suggestions?