Adding AirPlay 2 to older AVReceiver

I want to add Airplay 2 capabilities to an older Marantz AVR. It's occurred to me that I can add a separate AirPlay 2 Media streaming source to one of the input channels on the AVR. I have two inexpensive choices in mind. A) An Apple Airport Express v2 a digital streaming device but not as a Hub in itself. I have an extra AAX2 laying around.

Or, I could simply add a 2nd Apple TV in the same manner – digital connection for Music only. Could use as a Hub as well. Possibly a better DAC in the ATV than in the AAX2? Any thoughts on the viability of this endevour?