Avalon Eidolon Diamonds would be my recommendation.
The Eidolons are incredible speakers and with the new diamond tweeters, they are even better.
(Wish I could afford them actually!!!)
My friend with the Eidolons is very similar to you, in as that he loves to experiment. However, since he got the Eidolons, he has been cured of that, at least in regard to his speakers. (He has kept them for about 4-5 years now.)
FYI, his list of past speakers looks a lot like yours, in as that he too tried the Thiel 7.2s, the Martin Logans, etc..
(BTW, he uses the Lamm M2.2s to drive his Eidolons, and they work great! He tried out about half a dozen amps before coming to that conclusion, btw!)
The only thing I will warn you about with the Eidolons is that they are ruthlessly revealing, so your electronics need to be up to snuff (quality wise), as well as very powerful (200 wpc for SS amps, or 400 wpc for tube amps).
My two cents worth.
PS They are gorgeous to look at too!