You’ll need a Sonos Arc for that. And ultimately you’d need to upgrade the One SL surrounds to Sonos Era 300s. But certainly an Arc and 2 x One SLs and a Sub would do a very decent Atmos job (you just wouldn’t get any up-firing from the rear One SLs). Hope this helps....
While both soundbars integrate well into existing Sonos ecosystems, pairing with popular speakers like the Sonos Era 300, the Arc Ultra features Bluetooth integration, which will be a bonus for most users. The older variant comes with an optical to HDMI adaptor as standard, which will suit ...
depending upon size) for mounting on walls or under cabinets, thanks to built-in brackets. Based on the images from Sonos, it looks like the speaker