Don't really care about fancy stuff, but I'd love to be able to play mp3 files from an Ipod or old phone. My preference is a stock stereo, as I love the large, simple buttons and graphics. I don't want/need some aftermarket unit with buttons the side of a ballpoint pent tip that do 18 different things. Currently, I have an aftermarket stereo with no input capability. I've seen a couple of converted factory stereos with either an input jack (headphone type) or bluetooth capability. What are some pros/cons of these? Is there an aftermarket unit that would fit my basic criteria? What would it take to add an input (USB or headphone jack) to a stock CD stereo? I'm open to options beyond what I'm asking as well. Any thoughts & recommendations would be appreciated!