Can anyone recommend a good USB/MP3/ID3 head unit?

If you didn't care about the SD port.Alpine and Kenwood both have nice radios that have USB ports on them.Even better than coming off the front of the radio, they have a USB cable that comes off the back so you can hide your memory stick in your glove box,etc.; and not have to worry about damaging the face of the radio if you bump into your memory stick.