And your first post is to start a Ruger v. S&W cat fight? Oh boy, you sure can pick 'em...
I love the 586/686. 4" is just right. It's smooth, powerful, awesome recoil tamer, good looking, too. Get an 80s model (686 no dash, -1, -2) clean and used for $400 to $450 or so. A real bargain in the used gun market - one of the few ones left (other I know of is a S&W 28 .357 - also about the same price). Consider a 28, too, I'd suggest. I think the L frame 586/686 is the better gun, though.
I alternate between a 4" 686 and a 3" 629 as a "mountain" gun depending upon my mood and the bear threat.