@jmeyers The DACs you mention have different sonic characteristics. MSB for example will be more organic and harmonic, where the Bartok and Lumin tend to be more technical. If you think about what qualities you want, you will likely be able to narrow your choices.
I believe all of the units you mention have some sort of streaming or Roon Ready capabilities. If you are interested in DAC/streamer separates, then I agree with @koestner on considering the T+A DAC 200 as it is stellar for its price point, and with @choiceaudio on Aurender as a streamer. I am an authorized dealer for both brands but was an audiophile who already used those brands in my reference system prior to becoming a dealer for them.
FWIW, I’ve also heard from a few close to me that they are head over heels for the Grimm MU2. I’d like to hear it for myself as well. That said, it’s really, really hard to single out the performance of a DAC in any of the rooms, especially if you’re unfamiliar with the rest of the electronics, cables, and room itself. I know you’ll likely use AXPONA to narrow down your shortlist, but nothing beats hearing the unit in your own system.