As you are obviously aware of the Sonos offerings, think as any Sooloos audio endpoint as a ZP90/Connect without the wireless functionality. Meridian do not offer any ZP120/Connect Amp type offering nor Play type units although many feel that the latter may one day appear in a F80/M80 replacement.

You can mix Sonos and Sooloos. Depending on how you originally ripped your music, it may be possible for Sonos to share the Sooloos music library (not 88k/96k rips) but the success of this is dependant on whether your Sooloos rips contain suitable metadata (if you ripped via Control:PC etc it will not). It is also possible to use analogue output of Sooloos as an input into Sonos so Sonos can mirror (with slight delay) a Sooloos zone.

Personally I think that the Sonos ZP120/Connect Amp type units are a great for non critical zones such as garden or bathrooms where integrated amp makes for simple connection to a pair of speakers.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).