Unless you or you wife have severe allergies, do the responsible thing and adopt a dog from your local shelter. Both dogs I've had as an adult were shelter dogs. Both times I visited to adopt I have been shocked at how many healthy, sweet, calm dogs were brought in just in the few hours we were there meeting dogs and doing paperwork. Most are socialized, housetrained and past their rambunctious/destructive phase - much better for an inexperienced owner than a puppy would be.
So no, don't buy a puppy of any breed - adopt a shelter dog.