An Oppo 105D (=Sabre32), an Emotiva XMC1 and Stealth D-1, and an Audient studio converter. Would have liked to try some of the Schiit products but they do not have remotes and, so, will not work in this installation. Someone on this forum recommended a product but, at $2500 it was out of my range. Also tried another RME converter, the UFX, and it was similarly excellent. One of the advantages of the RME connections is that TotalMix avoids any kind of Windows driver need and, so, provides a custom connection to the DAC that is controlled entirely by RME's architecture. Am using a wired remote to control the UCX and this is not ideal but, at least, works.
Let me know if you have other candidates.