I'll throw in my two cents on the Michelins. I went through two set of Pirelli P-6s, one set of Yokohama Avid V-4s and finally Michelin MXV4s. I wish I had found them earlier. They solved a lot of the minor, irritating vibration problems. I've been told on one occasion or another that those other tires were "out-of-round". Not the case with the Michelins though.
On the steering damper, mine went out on the way to Hershey's world. I hit an expansion strip on the highway and my steering wheel bounced up and down like crazy. I thought the car was about to fall apart. Fix it before it gets bad.