I don't know, I was looking at some Martin Logan speakers back when I was debating which way to go. The ease of transferring the Sonos room to room has been wonderful though.
But they don't have the voice assistant, aren't they?
Not that I know of. Voice assistance isn't a requirement for me, but I would probably just get a Google Home speaker and work it into my system if it were.
I'm really disappointed Sonos partnered with Amazon for their new speaker. That stupid war between Google/Amazon only hurts customers and I won't support it (i.e. Amazon blocking YouTube access, removing Chromecast from the store, etc). It's all very silly, and I've used the Alexa skill with Plex before and I don't see anything exceptionally functional about it, aside from those times your hands are full of wet dough in the kitchen and you literally can't sit through 3 minutes of of a mediocre song that comes on...