well my sister just got a new suv, i think its a durango, anyway i told her i would put a cheap system in it, so i was think a AA assassin, but i can't decide on what size, i only have a kx200.2 amp, so about 230wrms, i was thinking a 12 since it has the highest sensitivity rating, but a 10's rms is 200watts so i can decide, and if i get the sub it gonna be in a sealed box between 1-1.5cf, so what size should i get?