I have the same problem with heat that Semi has and I do have a small room. I own the 150se and lived with them for over four years, yes i did purchase the BAT 600se for awhile, but after only four months went back to the 150s. SS just was not working for me. (lost all the texture that tubes bring to the game). But I still had an heat problem. this summer I purchase a Crown K1. Just to get through the summer, it's not the best amp out there, but it will get me to September. I also owned CI D200s but they did not have the bass power that I liked.
if you want to try SS amps do so, but DON'T sell your 150s right away.
if you want to try SS amps do so, but DON'T sell your 150s right away.