The Denon AVR-1912 is the most complete midrange AV receiver we've seen in 2011 so far.
It's one of the only two receivers in its class (the other being the) with built-in support for Apple's AirPlay, a feature that lets you use any iPhone, iPod Touch, or iPad as a wireless music source. While the Pioneer has a nicer interface, the Denon outdoes it with slightly better sound quality, a sixth HDMI input, a two-year warranty, and onboard support for Pandora, Rhapsody, and Napster.
The Denon AVR-1912 is our go-to pick if someone asks, "Which AV receiver should I buy?" and that's why we've given it our Editors' Choice Award.
Also check out our updated 2011 AV receiver spreadsheet comparing all the receivers we've reviewed in 2011. We'll continue to update it with more receivers soon.