Salk bookshelf or Dynaudio bookshelf? Or something else?

Thanks for the advice. I’ll look into those other speakers and reconsider my Adcom stuff. 
I did like the 40s a lot but they’re double the money. But if amp can’t do them justice, what’s the point!

Everest, 

My main speakers are older AR 48s and small, also old, Pinnacle PN5+. 
I’ve got old stuff, clearly, and they need to be refreshed. They sound decent, but...

maybe it’s just a midlife thing... ;-)

Thanks for the extra information. Unfortunately, I'm not up on vintage speakers, so I'm unable to offer an opinion on either of those speakers.

Email Jim and ask if there are any of his speakers near you.
Some owners will let you check out their Salk speakers.

I did and he responded already, though bookshelves are hard to find.

I think the advice I have seen here is already sinking in — I need to rethink power and speakers, both. Obviously, power is another thread altogether and I know I can just search those threads to find advice. So far, I’m seeing Schiit and Peachtree as two good, reasonable options (where reasonable is $2k or less for power). 

If truth be fully disclosed, I am also needing to think about the source of my music — a lot is streaming or ripped from disc at rates that would make folks “tsk tsk” me (which I would deserve). So there’s that piece.

Overall, what I have been trying to do is to reinvigorate my listening equipment without being sucked into a rabbit hole — either with money or with all the technical ins-and-outs. I can learn what the language means and try to educate myself, and of course I have been going to listen, but at the end of the day I need to make a reasonable guess and get things upgraded. But with kids still in the house and older parents (and an academic department to run), I lack the time to become a fully invested audio hobbyist. 

The advice here has been great and I appreciate nudges in a better and more informed direction.