Hello Awesome-O... I used Amazon mat in my doors, and I can already tell the difference in the quietness of the doors. I will do the headliner, just trying to get excited about pulling all of the trim out. I was hoping to do it the same time as the carpet as most of the trim needs to come out to do carpet as well. Waiting until I can afford the carpet and floor is also getting some matting put on it.
I will have to look into some encapsulation. Winter time you always have wet shoes and I want to keep my floorboards solid. I am really lucky with the condition of my floors. What brand of encapsulation you use?