When I bought my '05 Unlimited, I pulled everything out of the interior and had the inside of the tub Line-X'd. HUGE difference in noise reduction. As an added bonus, the interior is pretty much indestructible. The Unlimited comes from the factory with an under-hood blanket, and the rear carpet has 1" of sound deadener, so when I'm running the hard top with full doors it's amazingly quiet. When I get a chance I'll run a sound meter and see just how quiet.
Dyna-mat and other sound material is pretty expensive to do the whole interior, before spending the money I'd definitely recommend looking into Line-X or something similar. Plus you can hose the interior out if you need to.
Before & After:
Dyna-mat and other sound material is pretty expensive to do the whole interior, before spending the money I'd definitely recommend looking into Line-X or something similar. Plus you can hose the interior out if you need to.
Before & After: