the road noise in my Z seems kinda TOO loud...is it suppose to be like that or is there a problem with something. I'm tempted to test drive a new Z just to see if it sounds that loud too.

Tire Feathering? I don't even know what to look for in tire feathering...any pics of what it looks like?

 

crank the wheel all the way like you are turning, and go and look at the inside of the tire, the tread will look f'd up, u'll be able to tell