I would strongly recommend the SMSL SU-8. It's exceptionally good and $200 on Massdrop when they have them available. Otherwise, $250 direct from China. It's Dual Mono which I believe will make it a better choice than the SDAC. I don't trust that the Balanced version of the SDAC will outperform it, and you won't have the full feature set as well. Comparing directly through a/b switch from my Audio-GD R2R 1 and the SU-8, the difference is almost negligible. The Audio-gd has a bit more transparency, but both are in the same class I would say. For $50 more than the SDAC, I think it's your best choice up to the $800 range for a balanced DAC. Bargain.