Congrats on your new pup. Did you check with your home owner insurance on be able to keep him and not loose your insurance? I wouldn't be able to keep one here because of the fact my homeowners insurance would not allow it. They are getting big on this stuff now a days.
Just last fall an old couple across the river from here were killed buy their own rottie. It was stated that the dog was a nice and playfull. No one really knows what had happened but suspect the dog to have snapped some place along the line. They went to check on the couple and that was how they were found all ready been malled to death. It is pretty sad and even when they went in to check on them the dog still acted nice. Something just went terribly wrong. I hope you and yours have great luck with your new pup though..