I like the recordings from the 1972 tours. You get Echoes, CWtAE, One Of These Days, and the complete Dark Side of The Moon played like you've never heard it before. Check out the Dark Side Rehearsals and Bowl de Luna especially for a version of DSotM with a guitar version of On The Run and Any Colour You Like, which goes on for about 7 mins. The Great Gig isn't quite as good since the vocal isn't there, but the novelty of the version on these recordings, with the guy reading from Genesis is worth listening.

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Isn't it sad we're insane?