im gettin a new deck for the rider, probly an alpine cd-MP3 player. but i dont know nuthin about MP3. heres what i think though. you can copy your cds onto another cd in mp3 format and you can fit a lot more songs on 1 cd in mp3 format than in regular cd format. is that true? so about how many whole cd's could you fit onto 1 if in mp3? is the sound quality still as good? i dont know if that made sense to you but that and any other info anybody can give on the subject would be cool. thanks.