Thank you for all the postings fellas, I got a lot of good feedback here and some excellent suggestions. Looks like I'll have to resort to using sound insulating material in the rear wheel wells, doors and the cargo area. While I got ya here...I'm have a full set of tires installed this weekend. I'm switching to the Continental Extreme Contacts DW and hoping that might also quite things down to a dull roar.
I remember the tire roar that my 2004 350z had when I got to the end of the tread...it was deafening. I'm hope that the skins will help remedy most of the noise but I'll definitely be installing the insulation material regardless.
Thanks again
Steve