I had this problem before I went to the Eibach ProKit springs and the Bilstein HD shocks. I also had it but with a kind of thumpy uneven feel and noisier ride when I had the Continentals that came with the car. The Michelin’s H-rated Grand Touring MXV4 Plus tires have been the best so far. The tires feel very supple and quiet. I would like to try the sportier tires, but I am sure that the higher speed ratings with stiffer sidewalls would certainly give a noisier ride. I would like the superior cornering, because I love to run through the curves with my tight suspension, but I hate road noise.