It depends on your needs. The Oppo 205 is a 4K universal player with a VERY good DAC for a bluray player - you are paying for a jack-of-all-trades swiss army knife. However, there are much better stand-alone DACs out there if you can use your Marantz SA14 as a transport.
I think the Yggdrasil will have much higher resolution and tonal qualities. Extremely clean.
I have always been interested in the LKS MH-DA004, but I haven't gotten around to getting one yet.
I recommend you always use digital COAX cable. Toslink is a very poor interface.