$3500 floor standing speakers used. What would be your choice ?

@inna Ah, brings back some fond memories. I had a pair of MG Rev60’s many years ago. A very nice speaker using classic Vifa drivers. Learned a lot about proper loudspeaker set up with that little floorstander.

Highly suggest you check out Tekton. Eric has many options in your price range. I think you would be floored by the performance of his speakers.. They would exceed your expectations by all the criteria you listed. See the parallel thread/review just posted by teajay on the Tekton Encore monitor. Then go to Eric's website to see his bigger offerings. You might do well to give Eric a call given the many options he offers.

@inna   I agree that some of Eric's posts have not served him well.  He can be polarizing when pushed.  However, the couple of calls I made to him were very cordial and helpful.  It would be a shame to discount his speakers given that he has multiple models in your price range that I think would outperform the competition.  Also, his speakers work will with a wide range of electronics, tube and solid state.

Well, indirectly I think I did when you mentioned what you were looking for.  But to be more direct, the Tekton line is noted for a very smooth, detailed midrange that draws you into the music.  Contrary to one comment, these speakers are not bright.  I am intolerant of bright/forward speakers and I can listen all day to my Double Impacts without any fatigue.  Bass extension is quite flat to 30 Hz.  Powerful, taught, extended.  Last, but not least, the imaging is precise with a large, realistic sound stage that exceeds the Magnepans I had prior to the DI's.