 Like other reviewers, I have suffered the same "tire roar" and front end noise that has plagued 350Z owners since the cars inception.  After taking the car to Firestone to get my tires replaced recently, the helpful technician, a Vette owner, suggested that I take the car in every 3 months to have this toe-in problem fixed. You can purchase a lifetime alignment from Firestone for a very reasonable price and taking the car in every 3 months or so insures that the wear on the tires will be a bit more normal.  Tire wear aside, the car has been a dream and I have enjoyed it thoroughly. As I am getting a bit older now so the utility of a 2-seater is beginning to reach its end for me.