Best concert you've attended

(AWB) Average White Band 1980 Capital Center in Landover, MD, never forget went in at night and came out it was as early morning dance break outside.

Santana with Al Di Meola at the Mann Music Center in Philly,  August 8, 1980.

Oh yeah and every Dead show.

@noromance - I saw that 'Pros and Cons' tour in Oakland on 4/20/1985, back when '420' just meant Hitler's birthday, and it was certainly one of the best shows I ever saw. Interesting that the AI response said that Eric Clapton was playing guitar, but he was already off the tour, having been replaced by Jay Stapely, who did an awesome job. Had 12th row seats dead center on the floor and a friend snuck in a tape recorder and got the whole show. Sound quality was even good, though not up there with the NY radio broadcast that ended up as 'Pros and Cons in New York'. I didn't care for the 'Pros and Cons' album that much, but wow, it was so much more powerful performed live. 

great question.  It’s a long list.  The best for me would be the Boston Strong Concert after the marathon bombings.  Had all of the musicians and bands from Boston over the years and beyond.  When Boston kicked it off by singing, we were just another band out of Boston, chills.