I'm looking for a new CCW J frame, but there are so many models, I don't want to overlook something. I want all stainless steel (no alloy) J frame with a 2.5" or 3" barrel, round butt and either standard hammered or hammerless (no shrouded hammers) in .327 Fed Mag, .38 +P or .357 Mag. If I remember correctly, someone said the -3 and -4 revisions are the best. What models meet these criteria?