I really like Duplicati and Duplicity, but prefer rdiff-backup myself. In rdiff-backup, the most recent backup appears like a mirror, so getting the most recent version of a file back is just 'cp' . That is very handy. With the other tools, you must have them installed to restore a file. That can be a hassle sometimes.
Regardless, you are probably doing the best practices for backups using any of these tools.
You are to be congratulated.