I appreciate the input. I am little reluctant to add additional weight to an already heavy gun, but the holo sight seems to be a reasonable approach to help my aging eyes zero in better at 20+ yards out. At a little over $300 the Doctors Optics is not something that I want to buy and regret. Money is always a consideration, but I want the most reliable and effective shooting sight that I can match up to the revolver considering my intended use.
I will be using the SW500 as a source of fun for the most part (the flinch factor makes it a great source of laughter when watching my friends shoot it). I also plan on carrying it as backup when hunting dangerous game.
I realize that personal preference is greatly varied among shooters, but I am interested in what people have to say.