Here is the link to dog food analysis, its a very informative site that provides unbiased reviews of dog foods. Browse through it to get an idea of what foods are better vs worse:
http://www.dogfoodanalysis.com/dog_food_reviews/
also, i wouldnt try to find a food thats good for a specific breed. a dog is a dog so try and find a food thats good for dogs in general (from all the dog food that I saw which was geared towards specific breeds, they were all marketing gimicks and were very poor quality).
Masha