I have never heard a loudspeaker. What I have heard is loudspeakers as a vital component of a system. Over the past few years, I have heard two systems that stood out. One had Sonus Faber Aria IIs with top-tier Audio Research amplification and dCS Vivaldi stack as the source. The other was the Magico M2 with top-tier Luxman amplification and Aurender digital sourcing; I should mention that it also used more than $30k of Shunyata conditioning and power cords, and similarly expensive cabling, too, I am sure. Let me add that the “Magico” experience was jaw-droppingly superb. However, I also heard M2s at another dealer with a totally different setup. There, what I heard was essentially mediocre.
Obviously, in my estimation, the M2s have outstanding potential. Whether that potential can result in one hearing a revelatory audio experience is another matter altogether.