Good job on doing your research. It will pay off!
Here is a very helpful article on GSD's by Chris Wild, an experienced breeder who is also a moderator here. It will tell you a lot about what is available out there, and what to look for when deciding on a GSD.
(Types of German Shepherds, by Wildhaus Kennels )
Soli Deo Gloria.-used by
Bach and Handel to sign their work-
Because when I see a Horse cantering
for the pure joy of it, or a Dog working
with their beloved person, I think to myself,
"Look what God did".