Next Best Upgrade for Tidal MQA?

All of the Mytek DAC products are going to have a similar house sound so swapping one Mytek for another won't really change anything.  I would look at adding a tube preamp in place of the Marantz. 

I’m generally happy with the sound, but always chasing the cleaner, clearer, better separation, more dynamic, more lifelike...

To answer the question differently, I have a perceived weakness in the Marantz, and then to a lesser extent the DAC, and to an even lesser extent the Streamer... 

I recently went from the A23+ to the A21+ and it was a big jump, so I think there may be headroom in replacing some of the other components.

Suggestions on a tube preamp? Why tube?

I should add, any preamp needs to have a home theater bypass

I would want some more warmth and body to the sound to balance out the Mytek and the Parasound, but that's just me.  

@brux

ok, got it. i agree w jack d - priority 1 is get that marantz avr out of there - it is definitely the weak link

lots of good clean line stages out there, any one of them will improve the purity of sound by replacing the marantz receiver

you seem to like the clean and lean school of sound, more detail, rather than the other school which i would call the 'rich and saturated full fat cream' school... in which case i would say... the mytek dac is definitely in that school already, stick with it

most of the time folks who stream (and stream tidal) say that they want music that is richer in tone, more full and rounded (i.e. more analog in flavor), in which case I would suggest any of a number of different dacs

in your case, upgrade the preamp, remove the marantz, and see how you feel

happy to suggest various good pre’s... parasound jc2 is a good one if you like the brand, maybe even try a tubed unit see if that sound is something you like (dunno if you have had tube gear before)

good luck have fun