Jafant, I'm sorry, but I have to disagree. "...Electric guitar/electric Bass guitar-driven music..." unto itself typically doesn't go below the first octave where power demands are usually the greatest. Any of the Thiel's made after the 3.5's either/and drop below 4 Ohms and have a phase angel that the vast majority of tube amps don't have the current capability to deal well with. Tube amps when faced with such a load not only don't double down, they very often actually lose power potential. Tube amps will need to provide multiple times the equivalent ss Ohm rating. Very high powered tube amps can get saturated and start to have their high frequency capabilities compromised. Furthermore, tube Watts typically cost quite a bit more than ss Watts. Not exactly the best value. While tube amps do tend to distort more gracefully than ss amps, I'd rather avoid the distortion all together by getting more Watts for my dollar with ss amplification.
I've head c-j tubes with many Thiels, and while they do seem to have a lovely upper bass to midrange quality (amongst other things), it's a quality that distracts one from realizing the bass can be quite loose. But just as when one see's through an optical illusion, once it's noticed, it's presence can't go unnoticed. c-j ss are lovely amps that have many of the c-j tube amp qualities and after considerable auditioning between both on Thiel's, I actually bought and ran ss tubes with Thiel CS 2's (most durable and easiest load of any Thiel ever made with a 6 Ohm nominal/ 5 Ohm minimum load). A perfectly lovely combination. A word of caution though while certainly adequate with other Thiels, the larger ss c-j amps don't quite produce the doubling down current capabilities of some of the competition.