I'm sure someone somewhere must've mentioned this but at the risk of repeating a topic, Wolfgang's Vault has some incredible NW concerts from the late 70's and early 80's online and all free to listen to. Most of them are episodes of the King Biscuit Flower Hour and the recordings are of high quality. I just checked out a Berlin show and followed it up with The Beach Boys (they have all genres of rock).
http://www.wolfgangsvault.com
