One of the greatest shows I've ever seen was them opening up for Anthrax/Public Enemy at the Intl. Ballroom in '91 (iirc).
The place that was the Kroger was called the Unicorn, I think. That's where I saw Ice Cube/Black Sheep.
Ed Hall and the Minutemen are tough to chose between for me. Luckily, I don't have to. Honorable Mention: Crust (bonus points for stage presence) Best 3 piece playing tonight in Austin. Shellac @ Emos.
Shellac Big Black (3 guitar players + a drum machine) Mission of Burma (technically a 4 piece but only had 3 members onstage) Morphine Husker Du Yo La Tengo