I don't know if anyone has done this before but - welcome to the board, Marcus1964!
As I was lucky enough to have seen David live this year, my choice is Now And Always and Nemesis, from the show that I've been to, these two were the most touching ones. I liked the complete show, no question, and I really enjoyed each and every second, but if I have to pick just two, it's got to be those.
Love, Birdie