A few years ago I tricked out the sound system on my Chevy HD2500 pickup. It was an extended cab with an 8' bed. (You needed a football field to turn it).
From what I've seen they haven't changed the Esotec line much over the years, but I'm sure they have tweaked the drivers and crossovers some. I don't see it listed now, but I was able to get a kit with: 2-Esotec X 252 crossovers, 2-Esotec MW 172 drivers, and 2-Esotec MD 102 tweeters. (I believe then were labeled MW 170, and MD 100). I believe the kit was called the "System 262". I also used a 10" MW 180(182) subwoofer. They didn't have the Esotar line of car audio drivers then. But, I did have Esotar tweets in the house system.
I took the panels off my doors, took up parts of the carpet, and installed sound damping materials in the doors and the floor. I think it's a product from Cascade. The inside of my truck driving 75MPH was about 70dB, which is really quiet.
Luckily I didn't have to cut any metal on my doors. I did have to cut a little bit on the inside door panels, though. All the drivers were mounted on MDF rings I made. I was still able to put the factory grills over everything to hide the drivers from curious eyes. Also used the factory head unit, which at the time was made by Delco. I used the factory head unit because one, the Delco unit was better than most aftermarket and two, it kept everything stealthy. So that way, anybody peaking inside my truck didn't see a high-end installation. All the amps were mounted on a panel I installed behind the rear seats; therefore,not visible.
The subwoofer box I built was sized to the Thiel/Small parameters of the MW 180 and fit perfectly under the rear seats and across the floor hump, again stealthy. I fired the sub down. The box was painted gray to match the gray leather interior.
This system was extremely balanced and capable down to 25Hz without that one-note thump that so many installations have. I use to have fun with some of my friends who like rap. I'd ask them if they had any hip-hop Cd's. They would sit in my truck, I'd pop in one of their CD's and listen to my system with their jaws dropped to their chest. It was fun seeing those reactions.
One of my employees and I were driving to work one morning and sad to say, a tractor/trailer bought my truck.
Luckily, no one was hurt.