Any and all Sonos products can be used with yours. You can add two Play:1s* for surrounds for starters. Then you can add speakers in other rooms which can play alone, or grouped with others to play in sync. As to the Echos, you can use them to control Sonos, if the Sonos device does not have Alexa built in, but at this time they cannot be grouped to play with Sonos.
* I suggest Play:1s for surrounds because if you use Ones, the Alexa function is defaulted to the Beam, so there is no advantage over Play:1s.
Ahhhhh, thank you! And if I wanted to add a beam or playbase for another TV later on that would just seamless connect and we are all good?
Any word on when, if at all, the Alexas might work in that matter?
Also - am i able to have 100% alexa functionality with the beam as i have with my Gen 1 alexa? so control of lights and other controllers?