I'm in the market for a S&W .357 revolver and have been mostly focusing my attention on the 686 model; the 686 Plus the leading candidate at present. I have always liked that frame with the Hogue finger grips... one of the best fitting revolvers I've ever held. In many ways I wish I had bought one of these some years back when I bouncing between that and the Ruger Redhawk 44 Mag. What I'd like to know is whether there are particular models and model years that are considered better than others. I prefer a 3 or 4 inch barrel. Also, are there only certain ones that can be refitted with the Hogue grips? Lastly, what about the "pre-trigger lock" stuff -- better to look for one without? Thanks!