Let's talk alternatives to Sonos (compatible with Roon and with Android outside of Roon - please do NOT sell me Sonos, that is not the questions, thanks)

Sorry for breaking in here, but Blusound has its share of problems when used with Roon. I bought a Pulse Flex 2i a month ago and it tends to drop connection with Roon from time to time. I recommend that you read this thread before you buy:

https://community.roonlabs.com/t/the-roon-ready-promise-the-case-of-the-bluesound-2i/78666/87