[Big D]

I'd go with the sound deadner, It will also cut down on the heat from the road. I put new carpet in my 72 Jimmy without the deadner and the carpet wanted to wrinkle near the hump for the transfer case. I ended up using that silver foil insulation that looks like bubble wrap. It worked great and ended up being cheaper than the factory style insulation.

I also prefer the rubber mats for my trucks. I made the mistake one time of parking my Jimmy outside with the top off when the cottonwoods were blooming. I spent about 3 hours with a shop vac trying to get the seeds out of the (black) carpet!