Mirror Chuck = You get what you pay for. Or that's at least the way it usually is. Take your axe into the shop and try every amp they have. Even the ones you know you can't afford. Do it until they beg you to buy something (just don't play Smoke on the Water or Stairway to Heaven). Be sure you are happy with the one you pick out.

Tubes vs. Solid State - Well, I'm a valve guy. But I own, and use both. Transistor stuff is easy, light weight and cheaper. Tubes do a magical thing that only tubes can do. There's no comparison but each have their place. Shop wisely. I've seen great Solid State gear and crappy tube gear, and the other way around. Stick with name brand. I will make a bet though, if you buy a trans amp now, you will buy a tube later.