Well, a buzzing amp sometimes is better than no sound on stage. That is why I always use the amp along with the DI (preferably mine class D with neodimium cab, light and small - I know you will not be happy with those light amps if you are a big valve amp guy, but the idea is being able to carry my tone with me). Even if the amp is lousy, its bad sound doesn't mess with what audience is listening since the DI gets my signal before the Amp. We never get happy when tone is not real (that's why we're alembicians, after all, doesn't it?). But, if it is loud enough to manage to hear myself on stage, I can live with it (unhappy, for sure, but not lost).
(Message edited by mario farufyno on May 27, 2013)