I have a factory nissan head and also an eclipse 8454. Would the factory head unit and changer through a JL cleansweep or RF 360.2 sound worse than using my eclipse head? I looked at keeping the factory head and using the RF, but both dealers in town said start with an aftermarket head like my eclipse. As one dealer stated, "you are placing eq and xovers on a dirty signal by keeping the factory stuff". Maybe I missed something, but I though the point of the 360.2 and cleansweep was to clean up factory deck signals so it sounded as good or better than aftermarket with out having to swap stuff out?