Your config, in terms of security software, is just fine. VoodooShield should take care of everything.
As for backup images, it's not only a matter of whether you feel okay with reinstalling your OS from scratch or not, but also a matter of time. As members stated above, recovering from a backup image takes usually less than 20 minutes.
The difference with reinstalling your OS, additionally, is that you can restore it to an
exact state, for example, you can restore your OS to a state in which all Windows updates have been installed, which would save you even more time than reinstalling. (or, even, the backup image can contain all your installed applications too, so you wouldn't have to install them again after restoring from a backup image - even less effort, even faster recovery, and return to your everyday tasks)
However, user confidence plays a great role here. If you feel more confident with your choice, then by all means, do not force any backup software into your setup. When it comes to experienced users, many things are a mere matter of choice.
Thanks for sharing your config with us.