Also depends how many songs you are putting on a CD. If you are making an Mp3 CD with hundreds of songs, you might as well use a USB. If you are making an audio CD, or want to limit the amount of songs, it would probably be easier to have CDs with 10-20 songs on each and label them so you can quickly flick through them to find what song you want. Some people even go to having one song per CD to flick through them. One good thing for CD's is that all cd decks are able to play cds, where as not all cd decks will play USB, but you have to keep in mind that you'll need two coppies of each CD incase you want to mix two songs on the same disc together. Like everyone said, it's personal preference, but CDs would probably be the safer option if you are planning for different venues.