I recommend getting a player that supports Packed Bitstream (the default for XVID), such as the Targa DP-5100x.
If the player doesn't support Packed Bitstream the playback will be jerky. The workaround is to use a program called MPEG4Modifier to check for packed bitstream and unpack it if necessary. It doesn't take long, but obviously it would be better if you didn't have to do this. After updating the firmware my player supports this so there is no need to mess around converting any files.
Another advantage is to have a player that supports long file names. Some players list files in DOS 8.3 format, with only 8 characters visible, which can make it hard to tell one file from another. You could shorten them on your PC to make them more readable before burning to disc, but again it's a bonus if you don't have to.