here is my problem I have a JL 500/1 which is going to run my subs (boston pros) and I have kappa 5x7s in the doors reference 5 1/4 in the back dash I plan on running the speakers in the back off the deck and as for the fronts my choices are ppi pc2100 ppi pc2300 alpine v12 mrv-t407 or should I buy a 4 channel amp to run both sets the alpine is brand new so I don't know how good it will sound the 2100 sounded good to the kicker seperates I had in my old car if anyone has a suggestion it would be helpful