CEV

Hi, I'm new here. I currently have factory NAV in my car. I've been thinking of upgrading to an aftermarket touchscreen. My current one is not touch. Been looking at the Pioneers and I'm wondering what the differences are between the series, such as F,X, and Z? I'm not looking for anything to play movies on. Just want NAV, good sound, and to play music from my smartphone. I tried to find a chart that shows the differences between the versions, but was not able to. Thanks, Chad