Ideal Connection path to a dac?


Right now I use a desktop for Roon. Desktop is connected to internet via Ethernet cable from a router. An Ethernet cable connects router to a blueprint node 2i and then to a chord dac via optical cable. And than I use rca cables from dac to a preamp.

is there an advantage of getting the Roon nucleus device and not using a desktop, and then dumping the bluesound node? I like idea of direct usb connection between Roon nucleus and chord dac.
emergingsoul
If you to use a small PC with Roon I've found it's best to use a Roon compatible NUC which will run Roons OS, ROCK which is optimized for Roon and music playback. 
I Like the Pro-Ject S2 Ultra Streamer, and interesting to see the HDMI video out.  Curious how this is used?

i am hoping the usb out will allow a meaningful improve to SQ with all the addl bandwidth available. 
Still, trying to avoid using a separately room located desktop, a pain, to handle Roon. So I may go for a Roon nucleus. Don’t like having to leave desktop on all the time, etc.
On USB an isolator is clearly beneficial. I use an Intona USB Isolator. My DAC initially wouldn‘t be recognisable to the server when inserting the Isolator. Intona suggested to use an usb hub and I never looked back.