I've played mine in tiny clubs with 20 people playing jazz and backing people for singer-songwriter stuff, to outdoor rock and blues festivals for a couple thousand people. It's always worked well for me, and many times better than my tube amps that are 2 and 3 times as much. Then again, I'm a "listen to the whole band", and not a "listen to the guitar sound" guy - because what often sounds great at home by ourselves sounds terrible in a band mix, and what sounds great in a band mix sounds pretty terrible by itself at home. I've even had folks ask me "what tubes are you using in that?" - and you certainly can't tell which is the tube and which is the SS by the "guess the real plexi" clip I posted earlier. FWIW - if you're listening to a Rory Gallagher record I will still say what you are hearing is absolutely nothing like what was in the room - that's the joy recording. The mic and room play a part, then they EQ the channel, then they EQ the mix as a whole, then they normalize it, then they master it. Unless you were one of the very fortunate people to catch him when he was alive I'd say there's a good chance you might be stunned to try his exact amp with his exact settings [which were very bright]. The eyes have a hell of an effect on one's ears. I still suspect a Mesa might be exactly what you're looking for - a liquid gain of cascading sections with a smooth response.