I have the Sub Mini in combination with a Beam and 2 One as surround speakers, works great. As long as your speakers are all supported by the S2 app, you should be able to link them together without any problems. I myself am very happy with the Sub Mini, it fits wonderfully in my flat and supports the audio setup very finely but audibly.

ja

The Playbar is no longer in the Sonos range, but if it supports S2, it should work. However, I advise everyone to use a normal sub. All Sonos speakers have too little bass. I have the sub and still find it quite subtle.