I recently bought an amazing Pioneer VSX-822-K receiver , and I am in love with it. It has Exceptional audio and video quality, works with iPod, iPhone and iPad, has AirPlay, connects to Internet Radio (Pandora) and they even made an Pioneer ControlApp to control the receiver from your iPhone. The app works amazingly well, but in my opinion it deserves a much better designed user interface . So I got inspired and redesigned the main screen of the app for the iPhone 5.
You can also download the .psd file if you are interested in seen how I did it.