Short answer: I'm satisfied (and very grateful, in fact) for now and could be happy with my current system, especially the speakers, forever.
Long answer: Done for at least a year. The speakers are probably lifers. Still in giddy euphoria about them, even when straining to find weaknesses or something to complain about, or to nitpick about: just can't really find anything.....DANG!
I MAY do some other upgrades after a while, but dang, it just seems ridiculous and stupid to do so, at least for now, with the system sounding as good as it does. Anything from this point on would be done on a discretionary basis to "push the envelope"; i.e., to see how much closer the system could possibly get to (my concept of audio) perfection.
-Bill