Help me choose my star dog?

I hate to be the one to bring you the bad news, but, pounds and rescues will not have the dog you are looking for. I would look for a malinois, depending on your experience, and I would look for a dog with solid nerves, a clear head, stable and with a ton of drive. Most dogs like that are expensive and cannot be found at a shelter. I import my dogs from Europe because I have a hard time finding what I want locally. I also train for detection and patrol and I understand the requirements need. Good luck in your search.