[Dalton]

I actually used to do a whole lot of recording and producing.. the best cheap way to get a good acoustic sound would be to buy a "Seymor Duncan Woody" They can range from 30-60 dollars depending on what type you want. It goes behind your strings over the soundhole and all you would have to do is plug it directly into your computers line in port (using an audio jack converter from amp size to regular headphone socket size.).

The best mic you could get for what you want is a little expensive but would sound great is a "Blue (brand not color) USB Microphone" These are about 100 dollars but you can't beat that for home producing.