Originally Posted by LunaZ

This.
If it bothers you, then mod/fix it and your problem is solved.
If you've been caught off guard by the cabin noise, you didn't do your homework before buying. If a quiet cabin is high on your list of priorities, the 370Z is probably the wrong car for you because sound deadening is not one of its strong points. Even with a full treatment of Dynamat and other sound deadening materials, it will still be louder than something that was designed with a more luxurious intent.

Again, it's all relative and a matter of personal taste. While the dB meter might say it's loud inside my car, it's not nearly as annoying to my ears as my working environments which include a salon filled with a bunch of gossiping women trying to talk over blow dryers and convention centers with a bunch of haircare manufacturers trying to drown out each others stage presentations.
Maybe I just like how much noise my car makes because I feel like it replaces the testosterone I lose on a daily basis at work