In my experiance JL is the best. It is not the loudest but It is the clearest and has by far the best sound quality. So if your out to show off to people who are 2 blocks away go to a company like kicker but if you are concerned about the people who are actually in the car are hearing go for JL you will not be disapointed.
p.s. don't get me wrong JL can still go plenty loud