I just installed 4 Kicker DS65 (6.5) in the doors, Powered by a 4 channel Kicker amp. And then a kicker 12" CVR with a 500watt Kicker amp. It sounds GREAT. But I have always been a kicker fan, mainly because decent price and haven't had problems with them. Only problem is the front speakers are vibrating too much at higher volume. (I made the spacers for them with some MDF) But when I pull my door panel out a little bit it goes away. So it's hitting somewhere. Going to look more into it tonight when I get off work and figure out what it's hitting.