Nice config.
I would recommend you enable PUP realtime detection and Hardened Mode on Avast.
But if you feel safe with the default settings than it's up to you
Avast Free with Widows Firewall is good and even better with Hardened Mode set to Aggressive.
You might consider a third party free system back up solution such as Macrium Reflect(Free) or AOMEI Backupper(Free)
Nice config! Thanks for sharing it with us