This will be my first sound system. I am putting it in a 1994 Jeep Grand Cherokee. I am stuck between 2 brands of subs/amps. Memphis and Kicker. I have heard great things about kicker and know there good stuff. I havnt really heard much about memphis and was wondering how they are? I like their design and looks of the orange ones, (I think there called mojos). I am looking in the range of 2 12 inch subs or 1 15 inch sub. If anyone with knowledge of these brands could give me some input, it would be greatly appreciated. Also I would like to know the difference between getting 2 12s or 1 15, like what would the sound difference be?