I haven't seen a ton of bands, but the ones I've seen - well, some sound good live, others should stick to studio work.
Aerosmith was the worst. Didn't even sound like them.
I saw Krokus while I was in Germany at a little bar, with only about 100 people in the audience. Didn't even know they were going to be there.
I think their big hit was "Screamin' in the Night." A real 80's heavy metal hair-band. They had a few others, that I only recognized while they were playing.
They sounded great. If I wasn't standing 10ft away from them, I would have thought they were lip-synching.
Motley Crue was also pretty good, live.

