@grannyring @clio09 @charles1dad @larryi @atmasphere
Thanks to all for the vigorous discussion. It has been immensely helpful. It's good to be back in school.
I've followed convention and general norms on the issue of how much power is "right" by speaker sensitivity, etc.
Terry's findings with the LTA MZ2S with the Double Impact were difficult to accept when he first posted them. It's obvious it worked for him, his music choices, listening levels, his room, etc. though he did augment with slightly more power, though much lower than those 'norms' would dictate. Others followed and tested the same with replicated results, but also acknowledged that a few more watts of power was advisable.
It appears that there are clearly exceptions to the 'rule' and perhaps more than we would think or have tried. @clio09 's example being one that really stands out. Finale another. LTA/Triode one more, etc. etc. based on very specific speaker pairings from yours and others' posts in this thread.
In my case, your posts and the back and forth have made me much more comfortable taking a "risk" with a lower powered SET amp. That's good news, I think,...though it does widen the choices to consider.
I'm looking forward to @teajay reporting on the Double Impact SEs ... his take will likely help and direct a possible choice.
No decisions as of yet. I've had to start a Google Sheet to keep track of all the amp choices and who made the recommendations so I can reach out more specifically when I get closer to doing so.
Having the Pass XA-30.8 makes the wait very easy.
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If there are other recommendations out there, please post!!!