Some areas of music that you might consider are Baroque as suggested by Easy E and another is Bluegrass. You can find some pretty jazzy Bluegrass stuff (Dave Grissman, Sam Bush, Bela Fleck, and others) The jazzier bluegrass is easier to start on because of the little or no vocals, which can throw a lot of people off. Almost any acoustic music is a good change of pace and sounds better as you increase the quality of your system.
listen to it all
listen to it all