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

Have had many speakers over the years, but am very happy with my Magnepan 1.7i. With good source material they provide a soundstage and level of realism that I have not experienced before.

@mark200mph 

Are you a member of the CAS in Colorado ? 

Harbeth C7ES-XD.

Other brands I’ve owned since 1970

Dynaco, B&W, Theil, Quad, ADS, KEF, and ATC. 
Nothing meets my expectations like this Harbeth. Unlike every other speaker I have owned I find nothing to dislike. A joy to listen to every day. I will always own Harbeth. If I had a larger room I might go for the Harbeth M40. 

Klipsch Heresy IIs circa 1985 with new Crites caps powered by Dennis Had Inspire KT-88 & St Pete EL34s.  Sweet, dimensional, non-fatiguing musical presentation that will be with me to the end.

magnepan (3.7 and 1.7)

proac (response 3.5, 1.5 and d30r)

quad esl63 

spendor bc1/sp1

all with rel subs

(harbeths, klipsches, wilson's, horns, vandys, b&w's, totems, focals, sonus faber's all have come and gone over the years)