My thought is that unless you are looking for a hunting lab or plan on doing activities that are suited for a lab of a different build, the reputable breeders (ones that prove their animals) breed the traditional looking lab or what you are calling English. There IS a difference. Temperament is highly hereditable. I am not saying you can't have a calm hunting lab. But there is something different about a lab that has generations of proven temperament behind them in their pedigree.
What it boils down to for me...the dogs LOOK different. If you like the thinner hunting lab, that's the route you have to go. If you like the shorter, stockier lab, that's the route you go. You can find reputable breeder of both styles.