"Bay City Rollers. Now, that's music."

Ok kids, tell me what music to get next!
I've got more free iTunes to use & I'm looking to find new music that I like. Some of the things I've already gotten based on your recommendations are:
Harry Belafonte
Love and Rockets
Buddy Holly
David Bowie
Great Big Sea
E.S. Posthumus
Super Cat
The Postal Service

I've also picked up some guilty pleasures: Good Ol' Boys (Theme from "The Dukes of Hazzard") by Waylon Jennings, some Uncle Kracker singles, and my all time favorite horse racing song—Dan Fogelberg's Run For the Roses