WHERE you get the puppy from is just as important as the breed. Sometimes moreso. Please do not get a puppy from the newspaper/craigslist.
Now, since you said "grow into", I assume you want a puppy. You should know that GSD's, and all herding breeds, I believe, are very nippy//bitey puppies, which is something that should be considered carefully with such little ones in the home.
If you do settle on the GSD, talk to the breeder about your situation, and they should be able to help you pick a pup that's right for you.
Gable: Black and Red GSD: 03/02/2012 -
Suki: Russian Blue: 03/02/2013 -