What amp and are you going to use all four channels for one set? How many watts RMS per channel (@ 4 ohm) is the amp rated? The PPI set will take a lot more than what they are rated. People are running them here at 200+ RMS. I'm running 80 watts RMS to them and I want to do more.So none of the ones I listed you guys would recommend? Ppi the way to go?