I only use a portable audio player via USB in my car and the one I have is an iPod Classic. I need a non-Apple one with as less features as possible, only need to store files and have them read by my car stereo. I would like quite a bit of storage though, either built-in or via SD cards. I don't need high-end DAC and amp stuff built in, I only need the storage and need to be able to easdily put music on it (copy to it from a Mac and later sync with a backup application). I do like the Pioneer XDP-300R and now where to find one cheap, not that the price matters much to me. Or do I need to look to other brands. Or can I simply connect a USB HDD in my car instead of a player?