I have two Image Dynamics 12" IDMAX subwoofers powered by a 1000/1 JL audio V2 amp for each of them. I have JL Audio VR600-CSi for my four speakers and I'm going to get another aftermarket speaker for my center one I just haven't decided yet. What do you guys think about getting a Pioneer AVIC-N4 for my in dash head-unit? I plan on getting a JL 450X4 amp for my speakers. Just dont know what else I need to power my head-unit and center speaker. I'm not really experienced with car audio enough, so I hope you guys have some good advice for me! Thanks a lot for your help.