some insite for your upgrade
Wiff I myself feel the stereo in my loaded 2010 limited is not up to par. I have sync,nav and rear dvd. I wanted to retain all commands of factory system and sync. I found out the the jl audio clean sweep, jbl ms-8 and rockford 360.2 all take the speaker input in and let you go into rca jacks to a new amp/amps. You retain all factory features with these interfaces. There are other companies out there who offer something along the same lines but I went with the rockford 360.2 because of the features ,price,eq for front,rear and sub and all the crossover points. I have a standard limited not the el. It has a factory sub in the drivers rear panel of which I pulled out and made a fiberglass mold of. I made a new enclousure for a new 8 inch small enclosure sub and amp holder for the 2 amps for the system. I change all the speakers to 6.5 mid and tweet sets. 5x7 is a exact fit for this truck. I used all Cdt Audio speakers and Alpine pdx amps. For the doors I did 150x4 and the sub got 600x1. The sub that was in there was a 8 inch also and I could have gone to a 10 inch but I did not feel like messing with the grill. If you have a el JL makes a stealth box for it and that makes life easy. I wanted to retain all factory look and no space loss so I went this route. I have alot of car audio experiance so it was a fun project for me. It took alot longer than I wanted with work and 3 kids I had to sneak time in to work on it. I sound deadened the doors and over killed the power wire with a small second battery mounted under the truck, back by the spare tire. I did not need that but I did not want to worry about running the stereo for a long time without having the car running. I was looking for sound quality and not just boom. I am almost done with it so I can not tell you how it sounds. I did not have any problems at all the truck has alot of room to run wires and it comes apart easy. One thing when pulling the rear panel off you have to pull the tray and cup holder to get a good grip to pull the panel off. If you pull at it wrong the clips snap. Also the wires are easiest to grab for your speakers input right at the locations (where the boot from each door comes into the car). If you have rear dvd ther are another set of wires because the rear speakers go in and out of the dvd unit. So trying to find which ones are the right ones can be a pain since they are both the same color. Just grab them at the boot on the pillar. I hope this may help. Good luck.