Ok cool, few last questions so I can price and build this in my head first. For signal processers the RF 360's seems over kill if I am only technically powering 3 channels. Is the cheaper MTX ok for this case? I still have to tap the rear speaker outputs to drive the signal lines for the sub I assume? Would a 40x4 amp work, but more importantly would 80w be enought to drive a 10" sub? And my most pressing issue; Should I just buy the damn 800 dollar head unit with all the nav and blue tooth I want with a set of good front speakers some sound deadening and call it a day. Seems like the signal processor, amp and sub could really add up to over kill for what I want. It seems stupid to me to put 700 into the electronics end and still not have the great headunit features of the aftermarket.