Hi Jim,
Thank you for the question here as well as via the contact form. For the benefit of other visitors I will just repeat what I replied to you directly. Although we haven't tested Dolby Vision pass through in flesh, the HDMI subsystem of the VanityPRO should have no issues with Dolby Vision. It supports 12-bit Deep Full HD, Full 3D, HDR and 4K2K 60Hz video with 18Gbps bandwidth, basically the same as the Hdfury device linked above.
Karl, can you please describe how you have the HDfury Arcana connected in your system? I am not entirely sure about the purpose of such device and how it would help with the Dolby Vision. From the description I would assume it splits input HDMI stream into separate audio and video output streams. Is that correct? Does it feature some "smart" EDID management as well?
Thank you.
Pavel