Sonos quoted me $1795 for a 4 ZP80s and a controller. 4 receivers and an SB controller lists at $846, so quite a difference.

I've contacted support about being unable to update my SB controller, we'll see. I doubt any update will address the frequent connection/receiver recognition issues I have. As a comparison, in the same room about 40 feet from my Airport Extreme and down some stairs, my Apple TV has no problem hooking up, the SB controller is iffy.

Though the larger display and functionality of the Sonos controller is tempting, I'd be happy w/the SB if it just worked reliably, and I've already spent the money. That the Sonos is its own mesh network looks to be a further advantage for my layout.