I have not used this device yet. I do know that Audio Technica has just put out the AT2020 USB mic (about $150 street). If your computer already has audio software, all you have to do is plug the mic into A USB port on your computer and choose it from your audio control panel.
To hear what the mic sounds like, take a trip over to my online archive and look in the AT2020USB folder. From your inquiry, I think this may be a good choice for you.