Thinking of upgrading my Mytek Liberty DAC to?

Depends upon how much you are getting out of the system.
Qutest would be worth the effort to demo.
Likely more processing power.
Mytek DACs sound quite good.
Though I can't comment on Glass FX sound.

Hugo TT2 is high level good ...
Only DAVE offers more ... Low / Mid Definition ...
For < $2000 Qtest is Great!
Wouldn't consider less though ...
TT is Reference level ... that good ...
Ayre may be As ' good ' ... without having done a proper A/B ...
Ayre's gear is exceptional ...
I have not listened to DAVE in a Reference Level System.
Headgear only. (LCD 4z / Qobuz)
TT likely bests all listed ...