The best speaker you ever heard?

Much has happened since my 8/30/03 post for the Maggie 20.1. I was infected by the Maggie bug and have been living in misery since. I have now sworn off my beloved Maggies for more versatile speakers. I must now rebuild all over again (was that redundant). Oh, I didn't own 20.1's as I am a mere social services caseworker. I had the MG12 which replaced an inexpensive yet satisfying dynamic speaker with. Enough of my misery, suffice it to say that I have started to climb back up the old dynamic ladder with Paradigm Monitor 5's. It will be a long climb to my Pro Ac goal but I will make it. Best speakers I have ever heard were the Wilson Maxx 2's driven with the top of the line Halcro mono blocks and pre amp. I heard these unbeliveable speakers at Definitive Audio in Seattle. I highly recommend them, great service and products. They carry everything from Paradigm to Wilson and Magnepan, from Rotel to Halcro, Linn, Clearaudio, and Musical Fidelity. Speakers I most want to hear Avant Garde Trio's. Best speaker under 5k, anything by Pro Ac driven by Naim electronics (Stereotypes in Portland Oregon my favorite audio store).

Easy. Quad ESL-57 or ESL-63. No other contenders.

Magnepan MG 20, Quad ESL 988, Acoustat 2, and JustRealMusic Persona

Acapella Triolon Excaliburs, absolutely no question. For me, they redefined what recorded music is capable of.

This is not strictly a commercial system - one of our lecturers Sir Malcom Omar Hawksford at the University of Essex ran a couple of experimental systems which I still remember to this day. Heaven, and this was in 1988!
1. Digitally room equalised crossover with Audio Physics (Virgo ??).
2. Celestion 6000 system (600 with dedicated stand/'globe' subwoofer) with a digital crossover fed by a high end Sony CD transport and powered pair of Musical Fidelity A470 monster monoblocks.

For commercially available speakers, a few speakers stand out for me and all very different! Cabasse Atlantis, Quad ESL63, and Magnepan 20.