i have (2) rockford fosgate HE RFP3412 12" 4-ohm 400w subs in a 3/4" triangle mdf box that needs an amp...i already have a RF Punch 200.4 and a Crunch v-drive vu4.100 that powers the (4) speakers and (2) rear 8" 200w JBL subs.......i was going for either the RF Power BD500.1, Punch 500.2, or the Power 360.2 ........any suggestions as to which amp i should buy.