I agree that the Bluesound Node2i ($500) is the best option (Vault 2i ($1200) if you want to rip CD’s).
It’s internal DAC is fine, though an external one would likely be welcomed. Depending on how much you want to spend:
* Schiit Modi 3 ($100)
* SMSL SU-8 ($250)
* March Audio DAC1 ($400 shipped)
* SMSL D1 ($1300)
* Benchmark DAC3 L ($1800, +$100 for remote)
It’s internal DAC is fine, though an external one would likely be welcomed. Depending on how much you want to spend:
* Schiit Modi 3 ($100)
* SMSL SU-8 ($250)
* March Audio DAC1 ($400 shipped)
* SMSL D1 ($1300)
* Benchmark DAC3 L ($1800, +$100 for remote)