Summary: This tire started very quiet and well-behaved. However, after less than 10,000 miles the noise was driving me crazy! Pirelli will not stand behind their tires. I had the discount tire shop try to negotiate a pro-rating, to no avail. Went to Michelins after the Pirellis and I will never go back.
Summary: Noise between 35 and 45 mph. Started around 18k miles. Tire center has offered to pro rate new tires. I just hope I don't have to get the same thing. I don't think I should experience too much road noise with a 2010 Lexus with 50k miles.