AVR + digital streaming advice.

Hello to all. My question is this. I would like to update my Yamaha avr which is about 15 yrs old. It is in a 5.1 setup in the living room. I would like to have a digital streaming device like the Blusound node 2 or Paradigm PW link or Sonus. I only need the 5.1. I am looking at the Anthem 520. I am familiar with the ARC system. The only downside is that it doesn't have the Spotify connect etc. built in. I would like to use the ARC for the living room. However, I would have to buy another digital device to stream music. If I just get the PW link and connect to my Yamaha, I believe the PW link will only ARC the two main speakers, not the 5.1. Is this correct? I do have a Marantz in the bedroom using Audessy. It is fine for me. Should I consider another Marantz or Yamaha with the digital unit already present? I like the Anthem, but I would need to go to the 720, but it has more than I need, and much more expensive. I would much appreciate some sound advice. Wow, that just came out. Thankx in advance. Arthur