Best Live Albums Ever
Deep Purple's Made in Japan is an great underrated gem from a group whose internal frictions got worse due to massive overwork(management sending them out on 4 US tours in 1972 alone), promoting Machine Head. Ian Paice quoted his "The Mule" drum solo on album is one of his(and group's) best performances recorded and ironically, he belives it could've easily come from one of dozen other shows besides the version on Made in Japan during those tours.
Allman Brother's Live at Fillmore East, one of the top 2-3 live albums in rock history, if you're judging musicianship, how it eventually help change record industry's opinion live albums were "dirty records". In fact that Allmans weren't headliners on that March 1971 show,IIRC, it was Canned Heat. Allmans originally planned to play a select playlist, but their set went over so well Bill Graham told their managers to tell group to stay onstage, their set ended around 3:30 AM following morning. Canned Heat, one of other promised headliners, never took stage.