03 Sebring LXI Mods

Hey I have a 03 Sebring LXI. Its an auto which kind of sucks. Its the 3.0 6 cyl its pretty quick. I am looking to get some mods for it. I just bought Dayton tires for it. They are Z rated which is pretty good. I am looking at an Aem Cold Air intake. I want to get an Exhust system for it. Does anyone have recomendations and is there any other small mods I should do to imporve proformance.