Ive decided to go with an IA Lethal Injection sub for my first setup but cant decide whether to go with the 12" or 15" version. Either one will go into a properly built and designed enclosure and be receiving the same amount of power. I drive a small mid-80's hatchback. My question is what are the differences between the 12" and 15" version of the lethal injection subwoofer besides cone area? Does one hit harder or get louder than the other? What would you guys recommend? I listen to rap, techno, dubstep, rock, and some country.