The best time of year for you is the time that most breeders have puppies ready to go to new homes.

My opinion is that the breeder doesn't have to be a show breeder but they have to be doing something with their dogs. Agility, obedience, therapy are good choices. Hunting lines make smart dogs but they can be too high energy. It doesn't happen often anymore but a puppy that is not suitable as an assistance dog can be a great find.

Health checks on the parents are always a must.