Want to add some sound deadening to the rear of my XF. It's an 05 Limited Coupe. I'm thinking of either Hushmat or Dynamat. Has anyone done this with either of these two products? From what I've read, these are the top two in the business. Correct me if I'm wrong, I can take it! I know these are a little pricey but I don't want to do the job twice. If you have used something else to deaden road noise, please let me know what, and your results. If you prefer to email me, it's jpmlholian@aol.com.

Thanks,

Jim