new preamp

I would seriously recommend the Luxman C900u. I also think the ML 523 is outstanding. I doubt that spending more will yield meaningfully better sonics. I’ll get beat up but I can’t imagine that you’ll think Mcintosh is in the same league. In addition I’ve seen that mac owners are not happy w service. same for arc for what that’s worth.
The build, sound and ergonomics of these two units leaves nothing to be desired and both list for 15k. IMO

The new tubed Luxman CL-1000 sounded fantastic at Cap Audiofest last year and my god is it gorgeous!
https://positive-feedback.com/industry-news/luxman-cl-1000-vacuum-tube-control-amplifier-establishes...

I had a few at less than $2300 (Tortuga) and then I saw the extra zero! I wish I had your "problem".
https://www.tortugaaudio.com/products/passive-preamps/ldr3000p-v25-passive-preamp/

I’ve got a deHavilland ultraverve 3 i’ll sell for $22,999.99