I am completely new to the whole car stereo scene. Here's the deal, I just purchased a set of component fronts(Infinity Kappa 60.7cs - 90watt rms) and a pair of rears(Infinity Kappa 693.7i - 110watt rms). Along with it I bought a JVC Arsenal KD-AR560 head unit, but now am told I need a 4 channel amp in order to power the speakers. I have no sub, nor do I plan on getting one, what amp should I get (looking to spend less than 300, give me a few choices please!)