I think you should stick with one GSD. Trust me, just one is enough to intimidate. Later on down the road, you can begin to think about adding another. Two puppies at once will be very stressful.
Have you thought about where you will be getting a puppy from? Which lines are you considering? Do you know where you will be taking your dog for training?
Varick vom Haus Jeffery
Dark Sable, intact male
DDR/West German Show Lines