Growing up, I always thought of Led Zep as the greatest band ever. Ofcource, I haven’t had a chance to see em play. I have had a fair share of great shows I got to see, and I think seeing Soundgarden promoting "King Animal" three nights, back to back have been the best I have seen. They just ruled. Really-really-tight and intense. Check this performance of "Slaves and Bulldozers" recorded by the artists den on the same tour.
Slaves and Bulldozers