Thinking about buying one or the other. The GP-100 is 4" while the M60 is 3" with a Hi Viz front site (which seems pretty cool). Both are stainless. This will be my first revolver in a long time. I'm selling my Ruger P95 to get a revolver because I like the simplicity of revolvers. It will be used for target practice and home defense. I did a search for M60 but came up empty. I know the GP-100 is pretty well liked around these parts and Ruger customer service is good so I'm wondering what I would be missing if I got the M60. Which gun should I get? Can I put a Hi Viz sight on the Ruger? Are there any other revolvers (in any caliber) I should seriously consider? Thanks.