Personally from talking to numerous field trial buddys and dog food reps puppy food is one of the biggest rip offs out there. One guy told me his company makes puppy food for people who don't know any better and think they need to feed their pup a special. They make a killing off it too. I don't feed puppy food at all. I start my pups out on a diamond high energy. I don't think its the best either but I live in bfe so my options are limited. Proplan and Iams both are horrible.
If I didn't have to drive 2 hours to get it I'd feed Black Gold. Its about as good a dogfood as there is out there.
Also I don't feed much actual dog food. I supplement with raw deer scraps. If you can feed raw meat as part of your diet I would definitely do it. Most butchers will almost give scraps away. We usually shoot 8-10 deer per year so I almost never run out but if I do I head to the butcher shop.
Also I would never feed anything much over 26% protein. Most dogs have a hard time digesting high levels of artificial protein.