I'm going to go out on a limb here, and say the S&W Model 19 is the best .357 Magnum ever made. Now I would prefer one from the days of old, with no lock and a sweetly smooth double action, and four inch barrel. Light, accurate, beautifully balanced and finished. The Colt Python is a very pretty weapon, but it is heavier, but not necessarily more durable. The lock up and action on a Python is a little more delicate, in my opinion, and any "durability" it MIGHT have diminishes with the fact that it costs WAY too much. For the life of a Model 19, I could shoot it until I wear it out, and then buy a second one, for less than I would pay for one Python. Gun for gun, the Smith offers more for less. Pythons are for looking at, and Model 19's are for really USING a .357 for what it is intended for.