ok so i currently have two 10" rockford p3s in the back of my dodge ram WITH ARC AUDIO speakers and 1000s watt amp, with a rockford p2 amp as well. in the next week or so i am going to either be purchasing two 12" p3s or p2s to add to my 10" p3s. so my question is should i just buy another 2 chanel amp for the new subs or get rid of the 2 channel rockford amp and get a 4 channel amp? IF so what kind? your time is apprecitaed thank you!