I would not use a magazine as the only source to get a quality healthy long lived companion dog for the next 10 plus years.
Instead try breed clubs in the area, dog shows, dog sports, etc.
Look for breeders that health test and are active with their dogs, other than just breeding so many litters they have to advertise. kwim?
I am so happy you are doing your research in advance, this is very smart of you!
Next, once you have decided on your breed is the time to research terms like : responsible breeding, reputable breeding, back yard breeder, puppy mill, commerical breeder, and learn the differences and why they matter. Then, go to google and find breed specific forums on your choice of breed and ask about the particular breeders and what questions you should ask, if anyone has experience with those lines, etc.
Good luck on your search. You are certainly going about this in a responsible way doing lots of research.