Yep...
I know what you mean..
And it's just t my personal opinion of course but I do find the tyre noise far too intrusive in the cabin on the Z...
I have owned 911's, Z4M's... M3,M5's, Impreza's, skyline,300Zx...XKR's... the list goes on and on, but I have been driving years, but I have never heard a cabin so noisy...
I guess I'm sensitive to it as many don't seem to mind..
Ultimately it may lead me to selling the car if I can't get it too an acceptable level...