Hmmm...
1. Streets: Anytime, Anyplace. A spiritual zeitgeist that damn few performers have ever tapped. Must be experienced in person.
2. Bad: 1985, 1987, 2001. Again, awe-inspiring spiritual energy.
3. The Electric Co.: 1983, 1984, 1985.
4. Bullet>Running: 1992. Amazing, bold, creative re-working of something that was great to begin with. Theatrically riveting, but with heraldic playing to back it up.
5. 40: 1983-85, 1987. Talk about an experience that transcends its studio origins... another irreplaceable group high.
6. Until the End of the World: 1992-93, 1997, 2001.
7. The Fly: 2001. Staggering re-invention. A laser-shooting jackhammer.
8. With or Without You: 1987. Specifically, the versions with the Joy Division refrain. Otherwise doesn't make the cut.
9. Exit: 1987. Vicious. Forces a total re-evaluation of the song. Especially good with Riders on the Storm and Gloria interludes.
10. Walk On: 2001. Another spritual crescendo; much better than the album.
11. Elevation: 2001. One of the great pieces of live theater (coming out with house lights on) and audience participation both.
Personal fave:
Sunday Bloody Sunday: 1987. Specifically 11/08/87, with the slow intro, the day of the Enniskillen bombing. It was haunting in person, and even better in black & white in the movie.
I would have loved to have seen the Angel>Lovetown>Love Rescue Me with horns from the '89 tour.