I have a base as well and have changed out my system. I was disapointed with the factory installed stereo in mine. I went with a pioneer head unit becouse of the color. I changed the door speakers with Memphis (spelled wrong I think) and added 6" mids in the openings behind the seats. I then had two 10" subs mounted in the back in such a way that I did not loose my storage space. I don't know what brand amp I have but I chose it becouse the metal emblem looks just like the chrysler emblem. I am very happy. the quality is so much better due to the fact that the six speakers up front are a better quality than factory IMO. Even if I had not added the amp and subs I improved the sound greatly over factory.