I am putting together one Infinity Kappa Perfect 12.1d in a sealed 1^3 box and I need to know which Kicker amp would be a better one to use with my sub. The KX600.1 or the KX400.1. the 600.1 is 600 rms at 2 ohm and the 400.1 is 400rms at 2 ohms. I am building a SQ system, and don't really care that much about SPL numbers. any feedback or other ideas would be awesome!