I have a pair of Mementos and love them . . . . but I recently listened at length to a pair of Auditor M's at a dealer in Chicago (Pro Musica) and was mightily impressed. This dealer was driving the speakers with Naim electronics and the imaging and sound was incredible. When a male vocalist began to sing, I actually looked up, hoping to see him in the room with me - the speakers sounded so real!
With the dealer's setup, in the dealer's room, with his electronics, I thought "WOW", I've got to go home and see if I can make my Mementos sound this good. (I have since worked on my own setup and think I have succeeded) - but what I am trying to convey is that the Auditors sounded THAT GOOD.