woah, you like big dogs.
when I was little we had a rott and absolutely loved it. I was about 10 and my sis was 7 and it was great around us. Didn't every have to worry about it hurting either of us. I had a doberman mix too, but it died shortly after I got it from an accident. Really sweet dog.
I had a norwegian elkhound, that we had to put down today. I just want to cry. He was 16, which is amazingly old for those dogs anyways. He had been having problems walking because he has severe arthritis and since it's starting to get cold out, it was getting worse. And then yesterday, we heard him yelping and ran downstairs and he was standing with his head kinda tilted funny and front paw up. I think he had a stroke or a heart attack, because you could tell he couldn't see and he didn't know where he was or anything. It was really sad, but we expected it to be soon that we'd have to face it. It's not on your list of dogs, but he was a great one.