Abroller - i have owned two rotweillers, one from a pup (DD1 was about four when we got him) and one we took on about four years ago as a rescue from battersea. Both of them have sadly passed away. I have to be entirely honest here, i would not recommend a rotweiller to anyone without a lot of dog experience as they can be extremely unpredictable if not trained properly. They dont tend to give warning growls or barks as they are basically scared of nothing and no body. If they are going to bite you, they just bite. With gentle but assertive training they can be lovely family pets but the sheer strength of the dog can be overwhelming. I love rotties, they are my favourite breed, handsome, intelligent and of steady temprement as apposed to the GSD which IME can be a bit flighty. Rotties are pretty lazy and forgiving about exercise, but they do need stimulation. They are very dominant dogs so you have to be the boss. They dont tend to bark much, in fact yazz (my battersea boy) never barked at the door but would just stand there staring. The rotweiller stare is quite intimidating, and if a rottie is staring at you he means business. My yazz used to sometimes stare at me as i walked up the garden path to where he was sitting at the back door. If i were feeling brave i would stare back, he would run at me baring his teeth and growling, jump up and lick my face. Not so sure a lick is what an intruder might have got mind. But he was, well, very, um, special! We wasn't expecting to have more children otherwise we wouldnt have taken him on, he was a real handful at first and it cost us a fortune in doggy shrinks (all a waste of money if you ask me) and traning classes (very useful). We knew what we were taking on and with patience he became a lovely lovely dog. Sadly he developed bone cancer and we lost him. This was very sad actually as we had come to the heartbreaking decision to rehome him because i couldnt risk him with DD2 once she was up and walking because DD1 had accidently trod on his leg one day, he bit her and she had to go to hospital (she is 17 btw). It turned out that poor sod had bone cancer in that leg so the pain must have been awful for him, poor bastard, so i will always feel guilty for wanting to rehome him considering the awful start he had in life, but i had to put DD2 first as she is only two and as i said to my DP, if the dog bites her, im not physically strong enough to stop him (he weighed nine stone and was STRONG). Sadly that decision was taken out of our hands, but thank god i kept him until he passed away, i would have felt awful to have rehomed him and then found out he had that
I personally think that Rotties are great with older children but not too young as all the jumping around children naturally do gets them excited and you end up with nine stones of hairyness jumping around. Training is paramount too.
ABroller, if you already have GSDs though then i would have thought you quite an experienced owner, but rotties are really quite different. As i have said, i would find a GSD too challenging as i think they are far more intelligent than the rottie and some of them can be nervy. A nervous dog IMHO is a dangerous dog, so GSD pups need lots of socialising and gentle training at an early age.