Replacing my stand mount speakers

kubarony, did you have the S4's on stands? The reason I ask, a few years ago I bought a pair of Studio 10's, which I loved. I had them sitting on a pair of old speakers to raise them up. After several months, I bought the J29 stands, and was amazed at how much the sound improved.
All that being said, there are a pair of Persona B's for sale here on the site, new in sealed boxes, but pre-owned and discounted.
Good luck

These might also be a good find:
https://www.audiogon.com/listings/lis97jia-harbeth-30-1-full-range
Harbeths deliver a deep and engaging soundscape, much like your S4's, but they'll cover more ground across the spectrum.

Your English is very good, why do you say it is not ?
I like Harbeth sound too but that's me. What kind of music do you listen to most ?

Now, some members here will call me names for this but..
If you have pretty good headphones and good sound card in your computer, listen to some speakers on youtube. If recording is not bad it might give you some ideas. For example, you can clearly hear the difference between, say, Harbeth, Paradigm and Focal. Harbeth and Spendor are not too far apart, more difficult. Just don't listen to Lansche/Ypsilon and Kharma/Lamm systems, if you do you might not want anything else. But I think Harbeths convey a lot of an essence of music despite their shortcomings. 

Hello all responders
First, English is not my mother language but I'm trying.
Second, no room for stands.
Persona B not available here, yet. ADANTE AS-61 are on the way (few weeks). I believe that I can find limited samples of ATC, ProAc, SPENDOR, KEF (R3?), REVEL, KUDOS, TOTEM and probably more. Not sure the right size and model.
That's the importance for me to get directions and recommendations.
And to mention again, I'm for upgrade.
Many thanks, Kuba