Speakers I have owned:
Energy C22
Spica TC-50
Sonus Faber Electa Amator 1
KEF Reference 3
Merlin VSM SE
Genesis VI
Sonus Faber Extrema
Wilson Audio Watt/Puppy 5.1
ProAc Response 1.5
Totem Acoustic Model 1
Acoustic Energy AE1 .Signature
Usher S-520
Dynaudio Audience 80
Hales Revelation 1
Dynaudio Confidence 5
Sonus Faber Grand Piano Home
Sonus Faber Grand Piano
B&W 802 Nautilus
Tannoy D80
Tyler Acoustic Lynbrook
Dynaudio Contour 3.3
Revel M20
Sonus Faber Cremona
Sonus Faber Cremona Auditor
Sonus Faber Amati Homage
Sonus Faber Guarneri Homage
Usher X-718
Sonus Faber Concertino Domus
Sonus Faber Electa Amator 2
Usher BE-718
Sonus Faber Guarneri Memento
Some as short as 2 weeks (like Wilson W/P 5.1) because I could not live with the sound, most last over a year. The longest ownership were Dynaudio Confidence 5, Sonus Faber Extrema, and Sonus Faber Amati. Currently own Amati, BE-718, and Guarneri Memento.
I have also heard numerous world class speakers at length, not including speakers heard at show:
MBL 116, 111, 101E
Aerial 20T
Gryphon Atlantis
Avalon ISIS
Avantgarde Duo & Trio
Dynaudio C4 & Temptation
Elac FS609 X-PI
Usher BE-20
Sonus Faber Stradivari
Egglstone Andra 2
and many others I can't remember.
If I need to buy a pair of speakers tomorrow, my money will be on Usher BE-20. It has the most incredible leading edge transit attack among any speakers I have heard. Most people talking about trailing edge, or "air", of any instrument during playback. I assume the BE drivers are so fast you don't hear as much trailing edge and therefore some people thought BE-10/20 were dry sounding. But if you can get past the thought and learn to appreciate what real music should be like, the leading edge strike reproduced by Usher BE-10/20 are so addictive I haven't found anything, regardless of the price, that can compete.
I have read in a thread on Audiogon BE-10/20 can be further improved by changing out the cross over parts.