I also have a Marantz SACD 30n. It's in a second set-up in my office. Mated with a Unison Simply Italy and ProAc Tablette, it sounds terrific. I mostly use it as a streamer and like the HEOS app. I have played SACD disks on it and think it does a super job. My SACD "Katy Lied", by Steely Dan, never sounded better.
FWIW, since I'm using a LAN CAT 6 connection, I got a Stack SmoothLAN Network Filter which improved clarity, focus, and PRaT.