So I don't use HDMI from HTPC, but I setup JRiver on a computer then have it serve up the files over the network to my Marantz?
Glimmer, it's important for you to understand this is only about DSD. As I explained in my first post, for everything EXCEPT DSD, the HDMI connection is optimal.
All these other posts are talking about DLNA in the context of DSD.
Moreover, the Marantz's support for DSD over DLNA is limited: it is 2 channel only. You will never get multichannel DSD into it that way. You would have to convert the multichannel DSD to PCM, and send it over HDMI.
On top of all that DLNA is a pain. You will have a better playback experience if you avoid it if you can.
If you want to do DSD well from a PC, or multichannel DSD at all, you will need to use a USB DAC like the Okto DAC8 and not the Marantz.
I suggest you experiment with listening to DSD converted to PCM over HDMI compared to DSD via DLNA to see if you even hear a difference worth going to the extra trouble.