Interesting that those are three of the same speakers that I listened to at different hi end shops in the summer of 2019. All of them have appeal and certain strengths, but the Olympica III and the B&W left me wanting more, just didn't feel the magic, maybe it was the electronics. The KEF ref 5 seemed to hit the sweet spot for me at a little higher price point. The Liszt I never got to audition as no local dealer carried them which was frustrating. The speaker I bought after a year of searching and listening was the Devore Gibbon X as it hit all the parameters in one swoop that I was looking for. Personally I don't think that you can go wrong with any of them, some are more suited to tubes others to solid state and everybody has their own distinct things they are looking for in a speaker. I am just glad I found one that thrill the life out of me and I hope to keep it for many a moon.
Sonus Faber Olympica III or Vienna Acoustics Lists
......I am looking at both of these speakers and wanted a little feedback from the members here. They would be driven by an Esoteric A-03 amp - 50 watts of Class A power. Music is from the Allman Brothers to Frank Zappa to Neil Young to Muddy Waters to Eva Cassidy ....you get the picture. Let me know ...thanks