Bar none, it has to be Pink Floyd at Rice Stadium in Houston!
Pink Floyd 5th April 1994 Run Like Hell (Rain Like Hell show) - YouTube
Only PF concert ever rained out (this was the last song). The lightning and lasers shooting off into the clouds was spectacular!
Phil Collins was a very close 2nd
caught them in 73 at the L.A. Sports Arena on their Dark Side Of The Moon Tour.....they did the whole LP from beginning to end with a 4-channel sound system.....the Bud was everywhere that night....