Join Date: Mar 2009
Location: Milton, Georgia
Wow, you are all over the place here LOL. Seriously I applaud you for getting going on the research, but you are putting the cart before the horse with some of the questions. Based on those questions, I'm guessing you haven't been to many competition venues or training clubs. You are asking how to win a monster truck rally driving a NASCAR equipped car built by LeMans mechanics.
You first need to go out and watch and learn about all the different types of competitions and GSDs. There is AKC conformation and German conformation. A dog bred from either of those lines isn't likely to be competitive in both, and a mix probably won't be competitive in either (it could happen but it would be like catching lightning in a bottle). Then there is Schutzhund, which if you want to be truly competitive a working line is your best bet, but can be fun with a showline.
For AKC non conformation stuff, you can do well with any line as long as it has the drive and temperament for the activity you pursue.
When you say you are looking for a puppy to be good in both the show ring and the working field, which show ring (I'm guessing you mean conformation, so AKC or German) and the working field (which working field, agility, schutzhund, herding???). While the GSD is a very versatile breed and should be able to participate in almost any activity the handler chooses, the human in the equation is probably less versatile (meaning most humans, not specifically you) and will probably do better if you pick a sport and get good at it. Most people cannot decide to learn how to play the drums, the piano, the flute and the ukelele all at once (unless they are a savant of some sort). Most times you start with the one and learn the rudiments and then practice, practice, practice before adding another instrument, and many just stick to the one instrument for life!
Go out and watch and learn, try some stuff out with the dog you currently have. Then when you've narrowed down what you want to delve into fully, then you will have an easier time looking at breeders and what they offer.