I have 1000rms and I'm ordering one of these pairs for my extended cab truck. I can't decide between two Alpine Type R 12's or two Kicker CVR 15's. I can get either for the same price shipped. I have boxes for either, 4 cubes @ 35 for the R's or 8 cubes @ 35 for the CVR's. Which would be louder? Which would you buy?