I can only have one in the chain and I chose the Hifimans .
There's many more options out there, the NFB-27 being one of them (I already own, and know) but it is also slightly too bright standalone (internal amp) for my tastes and I'm yet to experience what the pairing with the EF-6 + HE-6 will get me.
If the EF-6 happens to be "too" transparent when compared to my SA-31, I have 2 options:
- NFB-27 + SA-300 mk3 power amp (in place of the EF-6)
- Find another dac that would fit the bill: M7, Ref 10.32, SA-2 and why not the Ciunas?