I just changed shocks(front) yesterday and the old bilsteins (202K mi!) weren't really that bad. I have Koni reds which are adjustable in the rear. They are extremely high quality and seriously heavy duty. I wanted adjustable shocks in the rear to see if they'd help with both over/understeer tuning and also in attempt to correct ride height (I know that sounds foolish). The Konis are very expensive so I went with bilsteins in the front.