my tire pressure is definitely within the specs and I have checked it recently.

The bounce back and forth is very slight but since I know its there I notice it. My GFs VW Rabbit is more comfortable to ride in than my car.

I just tell her that the X is more sporty. There may not be anything wrong with the car and I just have a higher expectancy especially coming from an Audi A6.

BTW my wheels are stock 17"