i just bought the infinity kappa 6 1/2 inch and 6x9 inch speakers. i was wondering if it is worth getting a 4 channel amp? and if so what brand should i get? i already have the audiobahn a8002T powering 2 audiobahn subs and it sounds like they are over powering my speakers and i want to be able to balance it out? i was looking at the audiobahn 6004T amp at onlinecarstereo.com or the alpine MRV-F345, or a kicker? i need help because i dont know that much about these different brands so please help me out.