I'm on my second Pioneer head unit and so far as the radio and amplifier go, it's hard to go wrong with any of their double DIN units, because at that level, they're all pretty much the same. The differences lie in the other features... to what level does it do Bluetooth integration, whether it takes an SD card for music and video, if it's navigation ready, etc.
AppRadio sucks balls though, and it's no better on the latest units than it was when introduced several years ago. Check out this forum. I think they have an AVH board too.