I've done a few massive searches over the years for The One, The Keeper speakers. I think the closest I came, sonically, were my Thiel 3.7s (magical match with my CJ tube amps). Unfortunately, aesthetically/ergonomically, they were just a bit too big for my room. Which meant...another Big Search.
As detailed in my "Devore" thread I settled on the Joseph Audio Perspectives, upgraded recently to the "2" version. They are better than the big Thiels in some ways, a bit less so in others. So it goes.
But for "keepers" a speaker that I can't let go are my other floor standers, the Thiel 2.7s. I bought them to replace the slightly larger 3.7s, and they preserved almost all of what I loved about the 3.7s, while being a bit smaller and looking even better in the room. They are a speaker that do magic for me. They aren't the best in all respects, but as a combination of attributes- in my room, clean, clear, incredible image focus with huge soundstaging, and with my CJ amps also lush and rich...they remain my touchstone. I keep them as a "safety speaker" that I won't get rid of, even if I play with other speakers. (Helps that I got a wicked deal on them).