
Hi Andy!
~ Welcome to the Forum! ~
I would say that your wisest move at present would be to discuss this in the first instance with the breeder of your pup. A good breeder will have the knowledge and experience to know what suits their dogs best for optimum nutrition in these formative years/months/days :) Find out what they advise and ask what their rational was behind this choice.
There is an old adage "one man's meat is another man's poison" and this holds true for our dogs too! You will find on nearly all the topics regarding different feeds on this forum that there will just as many folk who say "XXX brand is great my dogs look fantastic" and those that say "well when I put my dog's on XXX brand we had explosive diahorrea and they lost condition....."
All dogs are different and for that reason I would say you would be better listening to guidance from your breeder who knows the breed and dog well :)
Remember when Pupster comes to you it will be a huge change in environment, water, smells ..... the less you can minimise the change and upheaval for little one the better :) Keeping them on breeders recommended diet is wise until all has settled.
Should you decide to change the diet thereafter, it will really be a case of whittling down the feeds that suit your pocket,your dogs requirements and health and then its 'suck it and see' Im afraid (as I said earlier all dogs being different)
Although I feed a raw diet to my dogs (My family are Norwegian this is how we have always through the generations fed our dogs) I would say that you would need a 'mentor' and to read up and educate yourself. A lot of money goes into the research of Nutrition in commercial dry/wet dog foods and its not to be tinkered with by an un-educated layman as long term effects cannot be reversed and go unnoticed short term by the time un-educated owners get signs&symtoms of nutritional problems in their dogs it could be too late.
There are plenty of threads in our feeding forum for you to browse and get an idea of experiences and comments from other owner/ breeders on here of the varying diets.
Best of luck :)