I used a dynamat knockoff that has a soft rubbery material that does not absorb water. I used two layers in most areas, cuz more is better right? Including the one piece seat riser with center console.
I used one layer on the inner door skins over the factory sound deadening material. So far (45,000 miles) it has remained in place.
The carpet I used was the thicker ACC with the matting. I did have to trim the lower edges of the console to fit the seat riser hump since my console was for a non convertible.