I have the Touchscreen system in my S5 and a regular head unit in the GTN.

I tend to listen to talk radio more in cars or sometimes just let it run music through the Bluetooth link with the iPhone.

I have to say, the nav system in the touchscreen unit is the best I've tried. I have had various garmin units since 2000 and have 2 currently and a tomtom for the bikes and once I got used to the different way it works it has become my favourite. Mind you, I have a new system to learn on my latest toy which has another system to get used too!

Aero 8 GTN. #10