Original Apogee Full Range Loudspeaker
Avalon Eidolon
Dutch & Dutch 8Cs
And a version of Dynaudio's then flagship speaker I heard in the mid 1990's (Don't remember model)
Those were the only super speaker's I've ever heard. I've heard all the electrosstatics (Quad '57 and '63; Roger West vers., ML's; Koss; Stax), heard premium Infinity's (not IRS, but RS-1s); Revels (Gem and Salon 1's and 2's); Thiels; Vandersteens; B & W Nautilus; Porizelli Pipedreams; Beveridge Electrostatics; Dunlavys; Magnapans; lower range Apogees (Scintillas, Divas); Carver Ribbon; Wilson Watt/Puppies and Maxx's.
Many of then sounded like very good speakers, but not magic. Most of them sounded like two or three separate speakers made from expensive drivers that could play very loud but in two, three or four distinct voices. For me the ones I'd consider paying over $10k for, were those four speakers I;ve listed, because they were the only ones that seemed able to render a plausible illusion of real musicians playing in a real room.