Just about any tube preamp can sound warm, 3d, and inviting if you put the right tubes in it.
NOS tubes to consider:
Amperex-Holland,
RCA Black plates,
Mullard,
Brimar
the above will have the sound your looking for.
Beautiful Colored Tube Preamp ($10k budget) to Pair w/ Very Accurate Monitors (PSI A25M)
I'm helping a friend set up a dream home setup based around (4) PSI A25M powered speakers w (2) PSI A225M subwoofers. Prism Lyra2 D/A converters. I know the PSI sound and it's very pleasing for home listening and of course super detailed but I do want to provide some beautiful high end color /magic via a tube preamp which really adds a warmth to the sound. So curious what folks feel in the $10k range for a lot of that tube color and help warm up the very accurate PSI monitors some. Main source will be Tidal / streaming audio as well as a CDJ3000 DJ setup playing digital files. Having phono pre not essential - having a few inputs nice to easily switch between streaming and dj setup =] Maybe a manufacturer based in North America / US since based here and easier to deal w just in case any issues arise? But also not essential