My first appearance mod was a set of billet grilles which gave the car a more aggressive look. I'm not sure if the 20"s will look as good without lowering springs. I have 20" razors with a eibach pros, and they look awesome! 20" rims with a bigger gap tire gap might give the car a monster truck look. Quarter window louvers are also a great place to start. Roush makes excellent louvers that are removable, allowing you clean your windows when they get dirty. The louvers will give you car a mean, true - coupe look !