I use a camera to warn me of motion prior to someone touching the door. I want to know if someone is lurking outside.I put regular old steel doors with foam fill in the new place. I also installed Door Devil anti kick devices on them. I do not believe all the hype about nobody being able to kick the door in, but it will slow them down a bit (I hope).
Security sensors on all the windows and doors gives a little more peace of mind. The carbine in the corner does a little as well.
That reminds me I need to build the cross bar for the door in my mechanical room. We have designated that as the safe room in case of emergency.