My experience with Pass preamps is they can be a bit finicky in pairing with non-pass amps. Great sounding when paired correctly but can be a bit underwhelming otherwise.
if you plan on sticking with the benchmark and/or staying with balanced gear to keep noise floor to a minimum, I would scratch off SE designs above like the Conrad Johnson. I know you said that doesn’t matter but you would be surprised how much easier it is to keep your system quiet when everything is balanced.
the list you have is excellent otherwise and a series of very good sounding devices. I have spent time with 4 of the preamps you have on your list. I would also scratch off Bryston. Great gear but may not deliver the improved warmth you are looking for. As an alternative, i would add the Meitner pre which is $7500 and will deliver what you are looking for sonically with SS. Otherwise, I like Rogue.
without knowing more about your musical tastes and nuance I can’t be more specific. Full disclosure, I am a dealer for Meitner, Naim, Bricasti. I have no affiliation with any other brand you mentioned.
