Some musings, after going through all the posts:
Someone mentioned GP100 triggers needing work. I disagree, provided one has the time and patience to cherry-pick among many. By doing so, only two of my GP100 sixguns had or have triggers that need attention. One was my first one, bought in 1991, when all seemed to have rough triggers, but this one was not so bad, and I cleaned it up a bit, so it is really nice now. The second was from a recent limited run with 5" barrels, so if I wanted that barrel length, I had to take what I could get, as there were no more at the distributor.
My several other GP100s, my several SP101s, my Speed Six, and Security Six are all equipped with quite good trigger pulls.
There is nothing wrong with a good S&W, but they do not have triggers pulls any better than a cherry-picked Ruger.
I love a good S&W Mode 19, but the idea man behind it, the late, great Bill Jordan, said that it was meant to be shot mostly with .38 Specials. This tells me the Model 19 is a true carry gun, not a range gun. In actual practice, my Model 19 is rarely fired; just enough for familiarization and function testing. My actual training occurs with a K-frame .22, and with heavier revolvers that can stand up to extensive recoil.
The SP101 is certainly a contender for the title of an only revolver. I carry these more than any other handgun; the snubbier length being better for pocket carry, and the 3.06" being a nicely compact urban holster gun. I do carry more than one SP101 at a time, much of the time. These are wonderful weapons; life is good.