The Transtube 212 to my opinion should be a more powerful version to the Bandit II of Peavey's transtube range. If you are just using it for home and small gig, the bandit will suffice for you get the same thing abet a smaller package only. 80watts is plenty of power, and these can chug out awesome output.
Peavey in my opinion is always a good choice as it always deliver to expectation. A working man's amp. Don't listen to all those crap that its just an average amp, not great tone. Tone is very subjective, and believe me, this amp has a wider range of usable tone than most tube amps does.
Sigh, it does seem like I'm advertising for SL don't I. I feel sad too that that is the only place for you to get it.
Tube amps no doubt will give you more warm tone, but that is subjective too. Most tube amps will have a limited voicing, so it may sound great with this distortion effect, but with another it just won't click. Unless you are into stuffs like blues, jazz or rock & roll......softer stuffs. A tube amp IMO won't sound very much warmer than a transistor when in heavy distortion mode.
Remember, tube amps needs more looking after, higher maintainence cost , and hefty repair bills. Transistor amp are 'maintainence free' and only see the doc when there is problem.