15 sub

Hello! I’m looking to purchase my first sub and amp setup and am fairly new to all of this still. I am deciding between the Skar SDR15 with a Skar RP800.1 amp or the Skar SVR12 with a Skar RP1200.1 amp. The sub will be going in a proper sized ported box in a hatchback, and I mainly listen to rap...

I just have no idea where to run for 15's considering i have never heard any 15's.... i have 3 10's type r's in the same box but i think i want to go for 2 15's. I really wanted to get 2 orion hcaa's but the $550 a peice is brutal... any reccomendations for my direction? throw out some brand...