Although you stated you currently have a "rott", you are inquiring specifically about the "guard dog" breeds...are you in need of protection where you live?
There are certainly a lot of breeds that make good children's pets and loyal companions, but you asked about these three in particular.
Also some homeowners insurance companies maintain a list of breeds that are deemed uninsurable. It's unfair to say the least, but the media hype over fatal dog attacks by particular breeds helped to ensure this paranoia...
Just curious...
