Just replaced the Pirelli P6's on my 05 Audi A4. NTB had a special on the Yoko AS430 so I went with it based on internet reviews. However I find that the tire noise at highway speeds is much more than I like. Has anyone else had this tire? Does it get better or should I swap out the tire for something else (i.e. Michilen Exalto) before the satisfaction guarantee runs out?