Besides, it looks like a few DACs now-a-days have the HDMI option. So the Oppo can be used as a transport. I don't know of any other transport that has HDMI out for DACs like Bryston BDA-3, Holo or the Vinshine Denafrips DACs.
@milpai
Not sure it will "work" the way you may be intending it too. You may want to start perusing the AVS forum thread related to the 205, call OPPO tech support and/or read the manual. For your convenience, I've included the links herein.
http://www.avsforum.com/forum/149-blu-ray-players/2821841-official-oppo-udp-205-uhd-blu-ray-player-o....
https://www.oppodigital.com/ContactUs.aspx
http://download.oppodigital.com/UDP20X/UDP-205_User_Manual_English_V1.0.0.pdf