Yes Rotors can get run out "warped discs” which are felt under braking, however due to the set up of both the BA & BF’s front lower control arms and your driving style the bushes throughout the control arms get severely worn around 60 - 70 K's. Tell tale signs of the bushes being worn are slight “wheel balance needed feeling when driving” and of course the whole warped disc brake shudder feel on braking. If you replace your rotors and this problem still is there you’ll need to got down to your local suspension workshop and get a quote on replacing the bushes. Also while your there ask about getting your diff bush checked as well cause that bush cops a beating deluxe!