Hard to pick, but these are some of the more memorable ones:
Rolling Stones - Boston Garden, '72
Ten Years After/Procol Harum, Rochester War Memorial, '73
Yes - Tales from Topo Tour, Cornell, '74?
Bruce - Rochester War Memorial, '78
Neil and Crazy Horse - Buffalo Aud, '91
Cracker - Rochester Public Market, '07?
Been to a lot of great ones. Neil Young with Crazy Horse on the very first Rust Never Sleeps tour was pretty incredible, I think that was like 76 or 77. But Prince in Detroit with surprise opening band Morris Day and the Time, about 5 years ago...I'd be okay calling that one the best. Show lasted 4 hours, including a mid show solo acoustic set from Prince. Just unreal.
Just saw Joe Bonamassa last night at the Honolulu theater and it was one of the most incredible displays of musicianship I have ever seen, was just about to write a thread about the experience and saw your post.
He did not have his amps and was playing through what appeared to be locally rented Marshalls and there WAS a difference in his tone because of that. Of course he sounded fantastic, but I felt the amps sounded a slight bit muddy compared to his personal rig.
That said, I think he has been working on his voice or something because his vocals were outstanding, the best I have ever heard of him all recordings included. His playing was utterly breath taking and he was a great showman interacting with the audience. Wonderful show.
He started the evening with about 4 or 5 acoustic songs and followed it with a very tasteful mix of old and new stuff. I highly recommend checking him out. This was the first show on his US tour, he is heading to many US mainland towns over the next few weeks.
Stevie Ray Vaughan 7/3/90 Essex Jct VT
Ringo Starr, Levon Helm, Jim Keltner, Dr. John, Billy Preston, Joe Walsh, Clarence Clemons, Nils Lofgren, Rick Danko 8/16/90 Kingston NH
Allman Brothers Band 8/21/92 Stowe VT
Phish Clifford Ball 8.16.96 / 8.17..96 Plattsburgh NY
Luther Allison 8/97 Winooski VT
Phish 11/28/97, 11/29/97 Worcester MA,
Bob Dylan 2/22/99 Troy NY
Bob Dylan 8/4/02 Augusta ME
Neil Young and Crazy Horse 7/4/03 Saratoga Springs NY
Zappa Plays Zappa with Bozzio, Vai and Murphy Brock 6/06, Boston MA
Levon Helm Band, 3/24/07 Woodstock NY
Bob Dylan 5/17/08 Lewiston ME
Neil Young 12/1/08 Montreal QC
Bob Dylan 11/14/09 Boston MA
Roger Waters 11/2010 Boston MA
Neil Young and Crazy Horse 8/5/2012 Morrison CO