Thanks for the reponses, everyone. I've been meaning to schedule the car in to have all the suspension stuff inspected anyway; now I'll definitely make the call.

As for tires, the three sets were two good ones (Michelins and the Pirelli P-Zero Neros currently on the car) and one set of cheapies (Kumhos that I absolutely hated and we're on there long).

I'll have the car checked out. Thanks again for your help.

-Mike