ok to tell you the truth i have the same exact car and i know alot about cars, this car is a 6 cylinder V6 2.5l u can probable supercharge it but it will have to be custom work, u if u had the 4 cylinder version u would be able to turbo it : / sry kid there is really nothing much to do to this car.
anything u want done will have to be custom and will cost time and money.
best i did was
www.stratusphere.net, its a car club for cloud cars like stratus cirrus and breeze, mostly all the same with minor changes over the years, very friendly people willing to help someoen like you out..
best i ever got done to my car was intake and exhaust, and sound system.