Integrate or Replace
 

I have a 997.2 Turbo S with PCM 3.0 with bluetooth and iPod adaptor. I want to add a backup and a front camera. From what I have read I can either purchase NavTV modules OR I can replace the PCM with an aftermarket head unit that has an easier time adding cameras or even a 360 camera setup like Rydeen.

If I go with a different head unit I believe I will only lose the radio station and phone that displays on the dash. Do I lose anything else?