I've owned a LOT of tube guitar amps and a couple of SS and hybrids...tube amps are simply snappier and make people happier. I do use SS bass amps though, as you need extreme power for that. Same with tube hifi amps...60 watts per side with 90db speakers and a SS sub (so sue me) shake my walls if need be, so I bet this sort of thing would shake yours. Also regarding heat...with only 4 KT120s there is not too much more heat than a recent partly class A SS amp I was using, but the tube heat is expected...a Twin Reverb will make the beer on top of it sweat all over the place...just a warning.