What speaker is the most musical, one you never want to sell?

Another +1 for Rockport Avior IIs. Great at all volume levels and pair well with McIntosh C2300/MC275. 

Past speakers include ADS 810, JBL L166, Triangle, Harbeth, Sonus Faber, McIntosh, JBL horns and Magico A5s.

Long strange trip.

In my smaller room, recently purchased a pair of Sonus Faber Guarneri G-5 speakers. They are the best I ever heard, can't get over what they can do. For the price they should!!!! 

@traudio OP

Thanks for this, I've been cutting and pasting many members favorites, what a wealth of diversity we have here.

Elliott

Apogee Duetta Signatures -- bought them in the early 1990s and sold them after about 10 years because my lovely wife needed the living room. While I love the more room-friendly B&W Nautilus 801s I replaced them with, I still haven't heard anything that replicates the Apogee sound.

Quad ESL-57s. What could be more musical? They are almost 50 years old and sound as lovely as when I purchased them. They are run with a good AudioNote tube integrated amp and give me joy every day.