If you think Indiana's roads are bad...I lived in Detroit at the time I did my suspension upgrades. So I understand your concerns and can speak from experience.

With rubber or polyurethane, the arms will have stiction and deflection as the loads are put on the wheels. The control arm is not following it's intended arc in a smooth fashion. This makes everything feel stiffer and affects the suspension geometry. Whereas delrin bushings have virtually no friction and no deflection. Now the arm can move only in the intended arc and smoothly, transferring all the loads to the springs and shocks letting them do all the work. This is ideal for both ride quality and handling.