Those are all great dogs. Very loyal and easy to train when you start early. However I am partial to black labs (:
What dog should I get: Siberian Husky or a German Shepard or a Golden Retriever?
You shouldn't buy dogs! Why don't you adopt one? Those with no specific race are the most healthy and people have no idea about this... Most dog breeders treat their dogs like crap, it's really sad... If you are an animal lover, just adopt, don't buy... Animals are livings beings not objects that you can buy.
I think there's actually a Siberian Husky-German Shepard cross which is ADORABLE! I personally favour huskies, so I'm probably a bit biased, but Golden Retrievers are loyal and energetic, too :)