Check out the review below. The Marantz SA8005 is a solid player. I happen to own the original Arcam irDAC compared favorably to the Marantz here, at least for streaming digital. The original irDAC plus a decent digital interconnect can probably be aquired for much less than the SA8005, and when used with your Denon would sound better on redbook CD’s or PCM digital files streamed from a computer. There are many other high quality PCM DACs from other manufacturers coming available used for reasonable prices as people look for DSD and MQA capability (I would steer clear of the Arcam irDACII however).
https://www.wifihifi.ca/LatestNewsHeadlines/HANDS-ONREVIEW:MARANTZPM8005ANDSA8005.html
https://www.wifihifi.ca/LatestNewsHeadlines/HANDS-ONREVIEW:MARANTZPM8005ANDSA8005.html