I've been persuaded my the amazing ammount of topics on the internet about SS vs Tube to get a tube amp. I figure if i'm getting an amp i might as well get a good one, right? well recently i read an article that not only showed all the great things about tube amps but also showed the downsides ...

how much maintenance really goes into these things? how careful do i have to be carrying them? how much does biasing cost (I assume it's about once every 2 years for the power tubes) and how much do Powertubes cost? What is biasing (:D)?