"I cannot decide between 26 inch and 28 inch. Again, this will be for something to have around the house, self-defense, and to also get out and shoot and enjoy shooting. Which barrel length would be best?"
Neither for what you describe, but between the two the shorter barrel, i.e. 26" They are all good choices, pick the one that "speaks to you." As for a barrel for around the house, 18" to 20" would be best.