need 2 amps for 2 different set of subs first set are Rockford fosgate Rfz3810 and the 2nd set are P2 10s4 both are single voice coil....the rfz are 8ohm and the p2s are 4ohm... both are set of 10in subs thxs for any replys....was thinking about a rockford punch amps but i don't know what i need