I know a little about audio but really not enough to scratch the surface. I have just bought a single speaker for the center dash from a forum member. The speaker is an Infinity REF-3032CFX. I drove the Durango this morning and I now hear a damn piece of something rolling around the door. Needless to say I'm going to rip the panel off and figure out what's rolling around. Music is my wife's thing so now as long as I'm going to open the front doors up I might as well toss in some better speakers. Am I going to be doing myself a disservice by throwing in some Infinity Reference 6x9 2 ways in there and possibly doing the tweeters as well? The 6x9's will be the REF-9632IX and I'm unsure of the tweeters yet. I do not plan to upgrade the amp at this point although I know Rockford makes some sort of upgraded factory option. THoughts? Thanks!