Hi racegirl,
Try playing the music using a different audio player (ie not the LimeWire one). Tools>options>player then untick the use LW player box. Don't forget to press 'apply' then 'ok'. If it's still horrible, download from a different host & preview the song after 20%, then you'll see if it's ok or not. I think it's a good idea to preview anything you download.
Good luck!