AVR vs. reasonable seperates

Hello to all. My question is this. I would like to replace my approx. 15 year old Yamaha AVR in the living room. It is a 5.1 system and will need to remain that way. I have looked into the Anthem 520, around $1500. It does not stream music, so I would need to add that. I do like the ARC system. I have a Marantz in the bedroom at around $900. It can handle my Spotify which is built in and uses its own room correction. Is that a good fit for what I need in the living room 5.1. So the question is, Are seperates such as the Outlaw processor and 5000 amp something to consider at $1000? Still would need a Sonos or equivalent. Marantz AVR or Yamaha AVR and call it done? Not sure if there are other seperates in the $1500 range as possible contenders. Used from the good people at Audiogon is also a choice. Appreciate the input.Thankx, Arthur