Try the LCR and a Smith snub. See which one feels better in your hand. I own a 640 and have shot the 38 and 357 Rugers. Anything this small in 357 is a hell of a gun. Fun and still can carry 38 if you want to. The Scandium framed guns carry a premium and having a small metal piece so that above the cone area doesnt get gas cut. That annoys me for some reason. I would rather have a full steel gun but my 640 is HEAVY compared to the others.
640, in pocket with a sticky side out pocket holster is my 95% carry gun.
640, in pocket with a sticky side out pocket holster is my 95% carry gun.