What makes instrument immediacy, -separation & -bo

What makes instrument immediacy, -separation & -body density ?

Most speakers i´ve heard present a "you are there" presentation, where you have the feeling of sitting in the recording room/hall. But instrument separation is mostly poor and body is thin even with high end systems.

My ideal reproduction paradigm is : the instruments are playing in my room, 5ft in front of my feet and i "look" into the stage which is ideally extending beyond wall boundaries of the front wall.
The goal is:
maximum instrument body density already at moderate levels.
high contrast between soundstage,air around the instruments and dense instrument body. grip.
instruments appear deep anchored, earthed, energized,
Immediacy while having a cohertent not forward presentation.
deep soundstage

which products (cdp,preamp,amp (300b?),speakers) favourize these design goals ?

yet i´ve found bookshelfs and tube amps to be good in these categories, but havent found a excellent system yet.
Energy speakers were not bad.
Didnt like B&W 805, Dynaudio, JMlab micro utopia - possibly with wrong (cheap) amplification.

What do you think of Reference 3a MM Decapo i with VAC ren 30/30 in a 20x17x9 room ? system budget: 9k

greets

stonedtemplepilot