The tool I would recommend is Acronis True Image. The price is very reasonable, and it does a lot more than the Windows system backup.
Paul, one question: is the scheduling functionality gone? Does the tool only support manual back-ups?
For the life of me, I cannot find how to schedule back-ups after installing 8.1.
This is a game-changer for me, I can now comfortably start using Metro apps.
My only feature request would be the ability to pin live tiles to the desktop