I also put in one vote for Iron Maiden - Powerslave!
1971, Jarfalla, Sweden, Flasket brinner w/Bo Hansson: early Swedish prog
("prog" in both Swedish and otherwise sense)
1974, Stockholm, Sweden, Mahavishnu Orch.: this was the "Apocalypse" tour
which featured a string quartet besides the fusion virtuosos. The
best Mahavishnu I've ever seen.
1983, Stockholm, Sweden, Peter Gabriel: great music and to date the most
both intelligent and technically impressive light show I've seen.
1984, San Carlos, CA, Miles Davis: needless to say anything.
1984, Berkeley, CA, King Crimson: ...out comes a little man, around forty,
brown suit, hair growing a little thin, book-keeper-looking who bows
to the audience and sits down on a chair. Then he brings out a
grim-looking black electric guitar and starts to make very nasty
sounds...
1984/5-ish, Stockholm, Sweden, James Blood Ulmer w/ George Adams: just great.
1988, Providence, RI, Frank Zappa: the best Zappa I've heard live. Probably
matched only by the legendary around '73-75 band, which I missed
live.
1988, New Haven, CT, Sugarcubes: I went to this concert just out of
curiosity (What? Icelandic? Gotta see!) and was blown away.
And of course a bunch of others that don't come to mind just now.
Bjorn Lisper