Which subs?

Hello, I am 16 years old and thinking about buying my first subs. My father and both of my older brothers have subs in their cars, so I know just a little bit about this stuff, but not much. I was wondering what size subs I should get. I like rap music and I kind of like to bang it sometimes. I am thinking about either 10's, or 12's, or even 8's if you think it would work, but I have heard that 8's cant really hit the lows that much. I have some subs picked out in each size, but before I buy them I would really like to have some input as to what size would really be best for me. I am thinking about either getting 3 pyle 10 inch subs or 2 - 3 pyle 12's. What do you think? Also, I don't know if the amount of subs I get is going to make much of a difference, so feel free to add some input to that as well.thanks again!

I also want to add that I have an SUV, so will they, or will they not fit, aren't really big problem questions for methanks again!

http://phoenixgold.com/catalog/subwoofers/SX110D2 http://phoenixgold.com/catalog/amplifiers/sx-series-1200w-mono-block-amplifier if your looking for quality and awesome sound i would go with this set up. didnt put in a budget so i did midrange but anything on phoenix gold's new line up sounds great and have had no issues with it so far.