Quick review: I like the AVR-S920W, which sounds pretty good (for it's low price). But I HATE the selection of "Internet Radio" classical presets, and there's an awful programming mistake in working with music Media Servers.
The wireless antennas are also built-in on the unit, and cannot be easily replaced with higher-gain antennas (for use in large houses). I had no problem with the Internet setup, but the S/N ratio on this connection is relatively low. I note that it's doing both 5Ghz and 2.4 Ghz, but seems to have better reception on the 2.4 -- in spite of using only a "narrow" 20 Mhz signal. They SHOULD implement the capability of running 40 Mhz bandwidth, and prove for antenna replacement by using RP-SMA connectors.
"Internet Radio" doesn't allow you to enter or save any URL for a station you want to listen to. You must choose from a Denon-defined list. For the case of "Classical, High Quality", the list includes less than 10 stations. And, at least one of those is "dead", and another one has a man bellowing something about "enjoy fine music" every two minutes. (Bellowing much louder than the music content.) For the critical Classical listener, the finest stations in the World are run out of Athens, by "Psychomed.org". It is impossible to add any of these stations. Why on earth did they implement "Internet" with no URLs?
THE WORST THING:
My entire CD collection is stored on a computer. But, when I turn to the Denon "Media Server" Track selector, it DOES NOT! Allow for the playing of an Entire Album or Folder. Instead, you get options to "Repeat" the same track forever, OR to select tracks from the Media Server at random. Suppose that I want to listen to a Mahler Symphony, 4 or 5 movements, in sequence. They're all stored within in a Folder, e.g. "Mahler-5-Berlin-Abbado". The Denon forces me to repeat the first movement forever, or jump to "Random" order. Media Server music is therefore USELESS for the Denon: It can only play movies, where the entire show consists of a single file. Every 5 or ten minutes, you have to walk back to the Denon and awkwardly choose the next track.
I wonder if Yamaha Receivers have these issues. D-M's low end Receivers seem to sound a bit better than Yamaha's, but these Internet Functions are implemented very badly, WRT music.