I was a dedicated tube guy for decades.
Because of the heat in the Summer and speakers that needed more power, I started looking at SS. My conclusion and that of the Forum is that there was only two amps that could satisfy a tube guy-Bakoon and AGD. I now own a Bakoon headphone amp and AGD Audion mono blocks. And ultimately, AGD over Bakoon for my main system. Both are unique and proprietary technologies. Both give a clear window that is addicting but I prefer AGD for the overall SQ and the physicality over the Bakoon. Dartzeel and probably some other very expensive amps may be better in some ways but I would never change. The AGDs are my destination amps.