I advise getting the least expensive radio options they have and then buying all aftermarket.
I ended up getting the Boston acoustics package figuring it would satisfy me. I have always been into car audio and my last car had good speakers in it, so I figured the upgraded system would be good. It's decent, but not worth the money if you want really good sound.
I ended up replacing the entire sound system in my 08 Patriot Limited. The only thing I kept was the stock sub which now has a separate amp running to it. I may end up replacing the sub also.
I sold my NAV radio and bought a Kenwood DNX5120
http://www.kenwoodusa.com/Car_Entertainment/Mobile_Video_n_Navigation/Navigation/DNX5120
I use the NAV a lot because I drive for work. I also wanted a DVD player. The Kenwood has a Garmin GPS which is the best. It will also control an ipod or read a hard drive.
Btw, my wife was TOTALLY PISSED that I insisted on paying more for the Limited so I could get all the options including the NAV radio and upgraded speakers. Then sold it all... :doh:
Also, the upgraded speaker system just adds the sub and the tailgate speakers. The door speakers are the same as the standard system which is part of the problem.