My door speaker just went and want to replace both of them. I don't want a new head unit, subs or tweet. I have been looking at the alpine spr 17s type r speakers for the door. I notice people r switching the head unit as well, is this nessassary for the alpines to work? Is my alpine selection even a good replacement? I might go to best buy to get the speakers and see if they would put them in, is that a good idea Hahah? I need to do something soon because I'm tired of getting frustrated