Can't wait to get some hands-on time with the Denon. I like the Sonos amps a lot actually, but they're not the best solution for a rack. I am NOT a huge fan of their wireless speakers though, so it'll be interesting to see how Denon's compare. Either way, The 4-Zone Denon seems like a far better choice for my own house than having 4 separate Sonos Amps. We'll see how well Denon implements everything!