I picked up a very low mileage 2006 Mustang GT today. I want to improve handling and corner carving without breaking the bank. I am trying to decide between the Eibach Pro System Plus Kit vs Proline System Plus kit. I heard that he Pro System kit is the best compromise overall, good for street and some road racing. I heard that the Proline kit "messes" with the cars suspension too much and is almost too stiff for daily driving, kidney rattling. I just want to install this all in one kit without having to add other stuff. Am I correct to stick with Pro System kit? Also, my car came with billet style mustang wheels, what are these called? They are not bullitt wheels. Ger.