That small Jazz trio is a good example of a musical performance that "could" be captured accurately with proper mic techniques but even that is rarely done. Most all recorded music today is the result of manipulations by those involved in the production. I find good image portrayal by a speaker system important as it adds to the illusion of a live experience, even though real imaging at live concert is a rare experience. But how can you tell what is "accurate" since in 95% of the cases it is a totally faked manipulation? Is the experience of the speakers completely disappearing as a point source a result of speaker design or recording technique? Impossible to tell even if two systems are listened to side by side with each producing a different result. LOLTo me "imaging" relates to a visual stimulus, not an aural one. True, we have come to accept it as an aural artifact but it is done through manipulation. Very small settings (Jazz trio for example) and sitting at a specific location may present some aspects of what audiophiles termed as imaging but for the most part . it is with our eyes we see. our ears present a much more diffuse "image" ...
Personally I first try to setup the L & R speakers in a manner that gives the best result IMO. Then I committ the mortal audiophile sin and most of the time use some digital upsampling to include my other 7 surround effect speakers. Contrary to what I may have said before, I'm currently finding Auro 3D to give the best results here. It minimally changes the base stereo L & R image while adding some room reflections all around, I like it.
YMMV