I'm a 60s and 70s fan, I love classical rock, and lately I've been listening to lots of prog rock. Some examples
Yes-Close to the Edge
http://www.youtube.com/watch?v=P6xNhksHyXI
http://www.youtube.com/watch?v=WunYz7Io-68&feature=related
King Crimson - 21st Century Schizoid Man
http://www.youtube.com/watch?v=-Iyj_Ze0BHA
Jethro Tull - Aqualung
http://www.youtube.com/watch?v=W7-EEGiABBU












