I subscribe to the old adage that an ounce of prevention is worth a pound of cure, and in that light I suspect that a large part of road noise is transmitted to the unibody structure through the top mounts of the shock/strut towers, as well as other suspension attachment points. My plan when I get ready to do my audio upgrade and sound deadening in the Spring is to research how carmakers address this in more expensive vehicles, and see what might be done. My thinking is to possibly use some sort of composite or rubberized gasket material or sheet padding to sandwich in there to see if that makes a difference. It's just a thought, but I'm going to experiment with it if I can. If that works to any noticeable degree, I will then consider adding it at other suspension attachment points to the body. No idea if it will make any difference but something tells me it could. Anybody else tried it?