Re: pioneer AVH-P3100DVD
First of all if you have the boston acoustic system in your jeep already you will need metras CHTO-013 or PAC C2R-CHY4. now I Chose the Metra because i wanted to beable to adjust the Fade and Balance of the speakers which the PAC does not allow you to do, But with the PAC you are able to retain the Steering Wheel controls with the Metra you are not its really up to you what you want to keep. now for the NAV Bezel go to JustForJeeps and youll beable to find it the part number is # 5JN311DHAO.
I personally have the 4100DVD and love it, it is a great headunit and easy to use, good luck on your install, and we're here if you need any help.