Thanks guys. I'm going to have the tires rotatated and balanced again. I think it has been over 7500 miles since the last time I had this done. I don't plan on driving that fast again but was wondering if something in the suspension that looks and feels ok could cause the vibration. Both flex discs are newer and in good shape, and front is the correct flex disc as well as the back. I will deflate the tires to the recommended 27/27 psi that the fuel door shows. Wow! I never knew that label was there. I'm glad I asked! I filled the tires with air after driving and in hot weather conditions but could not find the inflation recommendation anywhere before. These babies are probably way too tight!!! Duhhh! The suspension is nice and stiff and turns are very tight with little to no play in the steering wheel.