personally i prefer the sound of 4-6.5" midbass and 1'' silk or titanium tweeters....midbass in the doors and tweters somewhere up higher....and then of corse a woofer in the back....but for ease of instalation if yo uare just looking for improved sound over stock then coxals are a good option...most of the time they just replace the stock speakers and can often use the OEM wireing and OEM head unit....