I've used Damplifier, Dynomat, Rammat, and el cheapo asphalt crap from Home Depot; by far the best stuff so far has been the Damplifier Pro for vibration dampening. The Dynomat is stupidly priced for what you are actually getting, I got my Dynomat at cost which was the only reason I used it. The Damplifier is by far the thickest stuff I've used and it's a 100% butyl dampner.
My new truck has the Damplifier Pro CLD tiles on everything below the windows with a layer of the Luxury Liner Pro on the floor, back wall, and fire wall. I don't have anything on the roof yet because I'm planning to do some major mods to the headliner and will do that in the Damplifier when the headliner is pulled. I may add some Overkill CCF to the doors in the future to cut down on more road noise.