@kraftwerkturbo -- "alternative (storing and playing my files, converting to analog, feeding my receiver) to my current setup"
How about the following option -- share the music folders on your laptop so they are accessible to your local network. (Or alternatively, buy an inexpensive NAS and store your files on that.) Then, purchase one of the inexpensive Wiim players which can be located right by your Onkyo. The Wiim has a built-in DAC (OK quality, but your Modi is better) or it can feed your Modi via an optical or coax cable.
Such a setup would give you access to your local files as well to a number of quality streaming services such as Tidal, Qobuz, etc. Wiim are also one of the easiest players to set up. All of this is controlled by an app on your iPhone or Android phone.