cknight98, I agree with everything except the sights. Ruger GP-100s with adjustable sights have a plug-in front sight that is a very nice design. You can change it with a host of Ruger or after market sights in a few seconds. The plug-in sights are inexpensive (except night sights). Ruger's rear sight leaf is also easy to change and are available in many different formats. The fixed sight models don't have plug-in front sights and of course you can't do much with the rear sight.
There's also a bunch of different grips available for the Ruger. Because it uses a post instead of a grip frame, you can buy round or square butt designs. Ruger has two styles of grips ... the standard ones that come on an adjustable sight model, and a compact set for the fixed sight model. Additionally, the Ruger Super Redhawk shares the same grip mount so any grip that fits one will fit both.