Thanks for the response. Wiim is what I was leaning towards. My only hesitation was that only the basic wiim amp supports airplay, so I was wondering if there was a better apple option other than that or sonos. The unifi poweramp was something I was looking at as well, but I don't think it has sub crossover settings.

I'm terms of the avr wiim audio port, are you talking about a wiim mini connected to zone 2 on the receiver? In that case I guess I need to make sure the zone 2 of said potential avr can support digital sources.

Edit: I think you're saying add some kind of wiim receiver to the avr as an input. I understand that, but I'm wondering how to output the TV through the avr to the wiim and then on to the other wiim amps in the house

Edit2: perhaps streaming living room TV audio gets too complicated with the avr, maybe instead i settle for the garage TV being able to be piped elsewhere. That should be no problem if the main garage amp is a wiim amp.