I'll start off with what I own. A 3 in bbl GP100 in .38 spl and a 5 in bbl GP100 in .357 magnum, both revolvers with adjustable sights. In regards to barrel length, if I had to part with one of the two, I would keep the 3 incher. I've owned a sp101 for a while, but didn't keep it. If I were...