GDS are great dogs. The are great working dogs.

But I would have to wonder based on what he said he is looking for if that would be a right fit.

The GSD while not being long hair unless it a variety is not a short hair dog. The can low a coat. If a 125 to 135lbs presa is too little than the most GSD will be too little too. The GSD in not as quiet of a breed as a Presa on average.