I'll be fitting 19s to my A3 TDI 170 S-Line quattro sportback soon and would like to lower it. Most of the spring kits (Eibach, H&R, etc.) seem a little hit & miss, plus the std S-Line damping is a little fierce, so I'm assuming I could improve matters with a coilover kit? I don't want to spend a fortune but I'd like a reasonable setup that will improve the damping and allow me to adjust the height of the car to suit the 19s. What do people recommend, where should I go to get it fitted (I'm in Kent) and how much should I be paying?