Definitely go with Appradio2 using the ARliberator Android app. I just installed the appradio2 in my Civic using ARLiberator and it works great.
I never even tried the Pioneer Android app due to the poor reviews. ARLiberator allows full view and control of the phone.
The Appradio2 hardware if very good.
Keep in mind with Appradio2 you are getting the following:
Handsfree phone (includes external mic)
Dedicated Home, MENU and back buttons.
External GPS receiver (GPS sent to phone over bluetooth) This is important since HDMI will squash the GPS signal on some phones.
Built in FM Tuner (very easy to mix FM audio with Android audio)
Speaker level amp
Good resolution display (800x480 I think). Overall does well in sunlight.
7" Capacitive touch screen with multi-touch
Supports steering wheel controls and rear view camera
Best of all, the dev supporting ARLiberator is very responsive and is constantly adding improvements.
I bought my Appradio2 from Amazon for $340, I also got the cable kit for $69, I know you can piece together the cable kit for less but I am happy with the quality of the Pioneer cable kit.