Hi is the Elicit Mark 5 Roon ready?
Welcome to the Roon community, @Floris_van_der_Veen.
I have moved your post to a new thread–it’s not a good idea to post questions in a stale thread, especially sales and trades posted some years ago.
The Rega integrated amplifier has two digital inputs: optical and S/PDIF. It isn’t a Roon Ready device, but would work with an appropriate Roon Ready streamer, for example, the Allo DigiONE or WiiM Pro.
There are many other options. Please take a look at the Partner page for Roon Ready devices.