Having used pepper spray for real on more than a few occasions, I will caution you to be prepared for the possibility that it might not be as effective as you hope [just like firearms]. I've seen both people and animals shrug it off like water. Ditto for tasers. By all means, add it to your HD/SD arsenal, because not all defensive situations call for firearms, but I'm just saying, is all. There are no guarantees.
Seen on a bumper sticker: "Exercise. Eat right. Take vitamins. Die anyway."