My vote goes to Ruger but I have to admit I don't own a SW. I have a Super Redhawk that is a dream to shoot especially after putting in the 10 dollar Wolf spring kit. This thing shoots really nice groups with every different reload I've tried so far, at 50 yards I'm getting a 3 inch group using a red dot and a rest.
I also just bought a GP100 357 mag, looked at the Smiths but I just couldn't do it. Haven't shot the GP yet but I have little doubt I won't like it.
Go for a Ruger, pick your flavor.