I still find the Berning zotl amps have the speed, drive, dynamic capability and bass control of the BEST SS amps with the dimension, texture, low level resolution and presence of the best tube amps providing they are ideally matched to the speaker. Really tough to beat that combination of virtues in a tube design. Another big plus is the efficiency of the tubes operating at lower filiment current for longer tube life and less heat in the room. I also agree that there is less place in this hobby for high powered tube amps unless they can somehow find a way to design them to be more efficient.