I am on my second set of Pirelli P7000 Supersports and both sets have had cupping problems. The set i have on my car now has about 5000 miles on them. Do people think i should trash them and get another brand of tires or should i wait until the tread is worn down more. The tires are starting to get real loud and are starting to shake again. By the way i have had the car aligned twice, so i know that is not the problem.