Does Fujitsu-ten build units For JBL? I have the entry oem 2010 sound system. Is the Fujitsu/JBL that much better than oem? Is it easy to bypass the oem system when swapping to JBL? If I convert, does JBL have proprietary speakers/ amp setup that I have to add? I know, so much to ask. Would it be easier to swap out to aftermarket system altogether? Thanks,