most bands now playing on "classic rock". i wish i heard their music as it was released to 'hear' the progression.

* the who
* rolling stones
* led zep
* metallica
* david bowie
* yes
* eagles
* doobie brothers
* emerson lake and palmer
* grand funk railroad
* grateful dead
* crosby, stills, and nash
* crosby, stills, nash, and young