They are one of many groups that sounded better before digital remastering. Deep Purple and P-Funk were other groups that should only be appreciated on vinyl.
Take what I say with a grain of salt. I believe that both "The White Album" and "Physical Graffiti" should only have been limited to one disc. There is so much pretentious filler on both (Boogie with Stu and Black Country Woman on Graffiti are two that immediately come to mind).
to confess....my Zep years were mostly pre-Graffiti
II, IV and HOH were my favorites
though III is unique and grew on me...
long before the silly kitties usurped it
(donning shark suit)
I saw them at the Cotton Bowl....loud and hard to gather...1975...Floyd played stadiums pretty good as did Skynyrd.
Stones not too bad...depending on the quality of the H that night