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I will say that the instrument placement/id in my system isn’t as precise as I would like and I would like a little more “presence.”

I know of two methods to get what you want.

The first one is to improve the acoustics in your room with room treatments.

The second way is to try spatial audio/atmos music.

I did both and I can sit and listen for hours to classical music.

If you have questions just post them.

Watch this 2 minute video of the London Philharmonic to get an idea:

https://youtu.be/7zZxyjx-WQk?feature=shared

Also, before buying any new gear I would call Sonitus and inquire about an acoustic room kit, I went with Auralex but if I were to do it again a room kit is easier:

Double Your Sound Quality

  Room Acoustic is a ´´ PreAmplifer ´´

For the Cello vibrant sound  ,  maybe adding two subwoofers.

I agree that vendors/manufacturers are valued members of these forums.  Most make sound arguments as to why their product might be desirable.