My car is constricted to 4" dash speakers, 5.25" door and rear coaxles. I'm not a rap fan, I listen to more metal/hardcore, classic rock, etc., sytle of music. I'm putting 4" infinity kappa's in my dash to take care of my highs because I know kappa series is bright and crisp. I'm also pushing 2 10" Infinity kappa pro subs in the back. If I want more of a fill for my door and rear speakers, any suggestions for brand? JL suggestions? I'll be pushing the speakers off a separate amp. 75 rmsx4 @ 4ohms (150 rmsx4 @ 2ohms).