Which high power SET

I agree with Atmasphere, before writing a check for a 30 wpc SET, audition in your system. SET sounds best not pushed due to their distortion.

Larryi also has good points. Have an open mind and don't get hung up on a particular type of amp. They can all sound great but different.

I would add a higher power amp in your list and hear how your speaker can sound with more current and power. My bias is for bigger amps ... gets old fast with under power amps. GL!

The first is the size of the listening room and the second is the listening level preference. The impedance curve is important as well, but to me speaker efficiency is a much lower priority.

For me, #1 priority is amp's ability to drive speaker sufficiently. If not, SQ will suffer whether low or high listening levels from my experience.

Listening level is not a factor in my book since I listen to all different levels depending on the situation.