DAP to Replace FiiO M11 (2019)

Hi everyone,

I’ve been out of the portable audio hobby since 2021, but I’m thinking of getting back into it and would love some recommendations for a new DAP to replace my FiiO M11 (2019). Currently, I’m considering the Hiby R4 or Hiby M300, paired with the Sennheiser IE600. It would be great if the DAP could also drive my HD6XX & Sundara effectively. Any suggestions would be highly appreciated. Thanks!