Wow an old album that rocked your world

As for Hi-Fi and for Music...
"Electric Ladyland" any decent edition. Eddie Kramer & Jimi Hendrix

As well as "666" by Aphrodite´s Child, another forgotten masterpiece.
"Meddle" by Pink Floyd, a certain German reissue from 1977 (I think).
etc. too many to mention, really.
For Music, in the first place...
Uriah Heep: "Very ´eavy ..... Very ´umble" and "Look at Yourself"
Blue Öyster Cult s/t and "On Your Feet or on Your Knees" live
Humble Pie: "Smokin´" Analogue Productions APP 4342 !
"Zarathustra" by Museo Rosenbach
"Friday Night in San Francisco" by Al di Meola, John McLaughlin & Paco de Lucia, any decent edition (can there possibly be a bad one...)

West Side Story.

All versions are good.

The Tilson Thomas has the best production and the original 1958 Broadway release is a classic recording full stop.

https://www.classicstoday.com/review/tilson-thomas-leads-brilliant-west-side-story/

For me, Led Zeppelin, The Who, and Pink Floyd introduced me to 'rock' music (and I have no regrets...)

In my early teens I wore out REM's Document, to the point where I didn't think I needed to hear it ever again.

Last week fiddling with my speakers, pulled the CD from the rack -- man the memories.  Solid album top to bottom too.  Not going to vouch for it as an audiophile grade recording, but it sounds great to me.

Ok, one more, and I am sure it will not be appreciated by most, but an album that absolutely punched me in the face and introduced me to underground extreme metal was Napalm Death's grindcore masterpiece From Enslavement to Obliteration.  \m/