Thanks to everyone who contributed their thoughts and input. After deeply and carefully exploring my own thoughts, and pondering everything commented on here, in particular your insights, Ralph, I made the decision, yesterday to purchase the PP dream amp (monoblocks).
I had been looking for this particular 2a3 PP amplifier for over eight years, and had a daily checkpoint, over that entire time, to see if Hi-Fi Shark showed any coming up for sale in North America. Over that period, I had become enamored with SETS, possibly due to not having any other great options. But this amplifier finally appearing got me back on track.
The story, unfortunately, has a rather sad conclusion. When I called to purchase it, they were literally on another line with someone who had beaten me to the punch by perhaps two minutes, at most. This is almost certainly the end of that dream. I’m retired, who knows if I will even be alive when another one appears, IF it even does, or for this kind of price. Not to mention, my hearing is still fine, but I have any number of friends who have been impacted with age related hearing loss. And once that happens, you only choice is to sell off your quality audio gear and try to learn to cope with listening to music reproduced in much lesser quality, since, at that point, it won’t matter anyway.
It appears that my existing "good" SET is what I will have to live with.
I thought I had a bit of time to purchase the amp because it was not generally even known to be on sale. And then, either Monday night, or early yesterday, some hours before I called to purchase it, all of that changed, which I was unaware of. It’s my unforgiveable mistake to live with. And regrets for likely as long as I can listen to music. Oh well, it could be worse, I could be dead or imprisoned.