I'd go for a rottie everytime,used to have a lot of them years ago,rock solid, great around kids and family, they have an inbuilt guarding on /off switch so they don't have to be trained to guard, I've seen these go in real life and it's truly f@@king scary and I guarantee whoever is stupid enough to take one on will still be there or what's left of him will still be there when you get home.