I really don't see the point for either device. My car is a Scion xA and it has an aux in where I can plug my HiMD into. It sounds great. As for the pro unit, I don't think that is where HiMD belongs. I think it is a great tool for recording on the fly and having high quality recordings at that. I think that sony should be focusing on mac compatibility so that everyone with either of those two systems can utilize its massive storage of ones personal music. I replaced my iPod last year in June with the HiMD MZ-RH910 because of the battery on the iPod being too weak.