@russ0408, your configuration was an enjoyment to read. Thanks for sharing it!
I've recently added the ublock extension for Chrome too!
I understand your resolve and mindset that a back up would not be necessary, although there 'is' an ever present chance of falling prey to an infection such as
cryptolocker.
*As far as having a back up plan,
@illumination bequeathed a similarly needed wisdom upon my own not very thin skull when I first posted 'my' config!
..and I have a flash drive plugged into it right now to do just that!
For an added layer of containment protection for your system, place your browsers into a virtual sandbox (except when updating). It's also free!
www.sandboxie.com
Lastly, if you are considering testing Antivirus programs or, perhaps, running additional operating systems on Windows such as linux,
the safe download site, Softpedia, descriptively reviews it in a very down to earth way.
http://www.softpedia.com/get/System/OS-Enhancements/VirtualBox.shtml