HTWWW or any version before Plant's voice changed sometime in late '72/early '73. I am familiar with versions on TSRTS and a handful of recordings, including Earl's Court (75), Southampton (73) and Osaka (72 - bad recording, but I can tell Plant still has it on OTHAFA). Any version after the voice change is just crap. There's just no comparison between the searing, laser-sharp rendition offered up on HTWWW (and yes, I have read The Garden Tapes, so I'm aware of the "purity" issues regarding this song and that recording in general. That doesn't change my view) and the plodding, semi-spoken versions that come later. No Jimmy Page guitar solo would change this for me and I'm astonished that others feel differently. But then, that's what opinions are all about.