what are your needs? is this going to be a family pet, are you alone, kids? will you spend a lot of time with the dog, or are you out of the house more then 9 hours a day? where are you located, are you willing to travel to meet the breeder and see pups, or will you have pup flown to you? Have you ever owned a GSD, are you experienced with dogs, do you have other pets?
These are the things that people might be looking for before they recommend a breeder to you. IMO, you should have thought about some of these aspects long and hard, so you will be able to communicate this to your breeder to match you up with the best companion for you.