well it depends. do you have large MP3 collection? or just CDs? i've archived all my music (CDs and downloads) to MP3, so I purchased an MP3 player. i can transfer 50-60 songs onto my player (Rio 600) in less than 5 minutes and be gone. for MD, you have to record a MD every time you want to listen to something on it. and if you have an older analog MD player, recording is similar to dubbing to a tape. newer ones are all digital though (for more than the past year i believe). I find MD annoying, it's a format that never really took off but still has some support. MP3 is nearly universal now in support for it, and will be the trendy thing for years to come (unless Vorbis takes over....which isn't likely, the public doesn't enjoy new formats like that). I would purhcase an MP3 player, and use it. make sure it's flash upgradable though, so that new compression formats can be added and/or upgraded.