I just did a shootout between the Bose 900 and Sonos Arc soundbars, and kept the Sonos. In my large room it did a better job of creating a visceral experience while maintaining clear dialog. Both are $900. I also compared them with their wireless sub and surrounds; the ensembles take everything to a whole different level, especially the Sonos, which really energizes the space and creates an often astounding sonic envelope. Now I can appreciate the soundscaping craft that goes into movies and current TV programming, whereas before it merely irked me by making the dialog a challenge to understand, even through the good speakers of a Pioneer Elite 60-in plasma. I am quite happy with the purchase. I don’t use it for music.
BTW, this set-up passes full ATMOS, even with my antiquated (though excellent) plasma TV, when used with an HDFury Arcana and AppleTV4K streamer.