I am wanting a new amp for my skar zvx. I know they can take about 3k power max and around 2.5k comfortably. I am thinking a banda 3.5k or a taramps 4k. I am going to order a 220 or around that size alternator with 270ah of batteries. Any other suggestions? I don't mind buying used stuff. Or a SQ 3500 if any up for grabs.