I'm a rock climber so I frequently pack my car with gear. But if two 12s is a lot better than one 15 I can sacrifice enough trunk for a better bump . Also... What's a better brand in general: Rockford Fosgate or Kicker? Also... I'd like some advice on a good sub/amp system for both options (one 15 or two 12s). I'd like to push at least 800 RMS watts total (whether that be in the 2 or just 1 sub). I would mostly like to bump rock and reggae so is type D what I want?