Mystery

I planning on getting a new 04 maxima, and i was planning on swapping over my current system from my intrepid. 2 JL audio w'3's with a kenwood exceleron amp. Would these be able to connect to the stock stereo? I have An alpine deck and 12 disc changer(not needed cuz of the bose 6 disc changer) but i didnt see that being swaped because of the set up of the stereo. Would it be a good idea to swap, or even possible at that? I know the sound package includes two 8 inch subs, anyone know how powerful they are, how the sound is just from them? Thanks