There is always going tp be something that seems better. Dynomat cost what it cost because it works. I still have yet to finish my rsx but just by adding 2 sheets on the bottom trunk it did help with the exhaust noise. Your not going to get rid of it all so it would be wise to add a resonator or even muffler.

When doing highway trips alot of cars leak road noise though the doors.

I'm eventually going to buy the bulk pack and do the roof,doors and finish the entire trunk.
good luck!