Really liked Summer C.E.S. in Chicago. Saw many Audio Rock Stars there e.g. J. Gordon Holt, Dave Wilson, Julian Hirsch, Mr. Shahinian, Steve McCormack et al.
Also liked T.H.E. shows in Las Vegas when I lived there. Got a textbook lesson in system break in at the Wilson room. Day 1: Sound was thin and stringy. Day 2: Sound improved somewhat but still not there. Day 3: System singing like a bird, excellent sound to beat-the-band. Peter McGrath playing homemade orchestral recordings. Just great!
P.S. Saw HP traversing the exhibits shortly before his passing. RIP