My first choice would be a 4" .357, without question. I would buy a Ruger GP-100. It has everything going for it. Rugged, easy to maintain, accurate, just the right size for belt carry, big enough to tame recoil and provide reasonable sight radius. With heavy use it will last several lifetimes. After owning perhaps 20 different .357 revolvers, and shooting them extensively, I don't think the GP-100 takes a backseat to any of them in any way. The used, blue, S&Ws really pull my chain but I have a phobia about actually using mine. They are so beautiful, and they arn't making them anymore, so I never put mine in a holster or take it anywhere other than from the range to the safe. Of course you can't go wrong with the 686 either, in fact it might be the perfect S&W for an all arounder. Although with my back to the wall I would have to say my Model 28 is my choice of the ultimate Smith. Ah, forget it, just buy several.