I will be getting and installing the 3.5" infinity kappas in the dash tomorrow thanks to all of your help I'm pretty sure it will be fairly easy job. Before I even considered dash speaker replacements a friend who was into installing car stereos told me that that was what I needed with using only the stock head unit which I do not want to change. But I really didn't hear him until after I read about them on here, question is since I know the stock door speakers are junk and I'm sure I will need to replace them eventually what will be my best option for fit and sound quality with the stock head unit and no additional amp? Thanks in advance