Speakers that can reveal orchestral instruments' positions

This is a subject close to my heart.  I obsess about soundstage.  My first point is a bit annoying but I have to say the source and the amplifiction are contributors.  As for speakers: in my opinion they contribute the most.  Here is my 'Profound Statement':   Directionality is overwhelmingly  a function of treble.  So high quality speakers with tweeters that do 20 khz comfortably are a must.  Tweeters beyond the theoretical limit are (in my humble opinion and  contrary to others) a benefit.  My current position is that the overtones of instruments beyond 30Khz is relevant to directionality.  So in theory and my practical hearing means I try to buy between on 48 khz and 96 khz.  44.1 khz is fine. Vinyl is fine too.

All this from a pettifogger.  I have Matrix Audio DAC, EMM Pre, Pass Power, Magico Squeakers.

Electrostatics are known for their imaging qualities. Audition a pair of Martin Logans and see/hear for yourself 

Stravinsky's Rite of Spring, Yannick Nezet-Seguin, Philadelphia Orchestra, Deutsche Grammophon, Hi-Res FLA download (24 bit, 96kHz).

In dynamic transient passages, like the subito fff in Spring Rounds, the timpani, bass drum and gong have a really 3D effect. 

Shostakovich Symphony No. 8, Andre Previn, London Symphony, Angel, on vinyl. Xylophone is very distinct, in imaging. 

Equipment: Thorens TD145, Benz Micro Wood SL, Benz Micro PP-1 MC photo preamp, Audio Experience Symphonies Tube Preamp, Nikki Alpha II power amp, handmade planar speakers. I've been playing a lot of records on an old Dual idler 1009 turntable. Amazing.

I have a new pair of X series Spatial Audio speakers that just stun me with their realism.  Great OB speakers created by the research of Clayton Shaw.  Best value and best representation of OB speakers on the market today.  Of course, your other components make it happen also.  I have a Don Sachs pre, Carver tube amp, all fed by a tube DAC.  Finest system I've had.  I spend a lot of my time listening to music lately.

I think omnidirectional speakers generally have very large soundspaces but may be a bit less detailed in their 3d. Try to see if you like this or a more focused 3d from a conventional speaker.

I heard the Bacch SP processor at an audio show. It alters the signal to make the left-right separation even clearer. Very interesting but pretty expensive. I don't know if they affect the depth also, might or might not. See if you have any dealer around you that can demo them.

https://www.theoretica.us/bacch-sp.html