Hey guys, I have a stock non bose system in 04' deville. 1" tweets and what I belive are 5.25" in ea. Of the 4 doors and a stock 10 sub in rear deck. Oh and a center channel idk wtf it is. A pair of 3.5"? Any ways I wanna replace all door speakers thinkin alpine sps 500s but I'm not sure I don't have much $ to blow oh and I need a 4channel amp to push them. And I would like to replace the 10" sub in rear deck and amp of course. Could someone plz. Give me some advise on what to buy. I don't have to do all at once. But would like to get my mids and highs soundin crystal clea well, sound great for a guy on a budget. Thank you so very much.