Asking the question how high is up is always problematic.
I'd say if you can afford the Jggy then get a Moby ($250) and see if it 'works' for you.
If so, then jump to a Gumby or Jggy and sell the Moby.
What the other MB dacs offer is more of the same degree of inner detail and focus, not to be confused with 'regular' detail.
That difference is, inner detail occurs everywhere not just in the top end, and focus is the ability to hear INTO the nature of each instrument, and not just, about them.
And once you hear this difference that these MB based dacs can offer, the Moby's bigger siblings just bring out more of the same, as you move up the ladder.
Or not, based upon your system and preferences.
And taking a 1st step with a ≈ $250 dac as an experiment, when considering a $2300 dac, is a relatively painless way of finding out for yourself.
Just a thought or 2 to consider.
JJ