Personally I wouldn't choose the one with the shorter snout because I'm seeing it as a major flaw that could cause some breathing problems. The other two look really nice and normal, but again you can't tell what the coat will be like at this age, or how long the legs and body will get. When you buy from a breeder they won't keep the pups longer than 3 months and by that time all are generally spoken for. Can you ask the breeder to let you have the pick of the girls when they are about 9 weeks anyway if you go see them at that age. They are running around, playing, growling, jumping on each other, playing with toys and developing their personalities. You could watch them for about an hour to see if they are outgoing, walking and running ok, have bright clear eyes, can hear and so on. (make a list) Put a deposit on the one you choose, (if you do decide on one) and also ask the breeder to make up a contract that she will buy back the puppy (the same amount as you paid) in the event your Vet. finds any major medical problems that you aren't prepared to pay for, such as LP, liver disease, heart disease and the like. Well that is my suggestions.
Good luck to you.