I decided on getting a Pair of 3 way 6x9" kapps and 3 way 6.5" kapps for my rear speakers. i got a 01 grand cherokee. i was just wondering if i should buy a multi channel amp like the Hifonics ZX6400 its 4 x 85 Watts @ 4 Ohms. Do you think this would be enough power? and a good choice?