Also, if you are trying to decide if the SH is worth it over the base, you have to look at what you do. If you arent going to take any turns really fast and wont use the ATTS, then the base model will suffice. The other stuff like rims/painted side skirts you can add onto the base if you REALLY like those over what the base has, its just a matter of if you want the ATTS or not.