Of the choices listed, I would pick the K-frame S&W. But since I am not limited to these choices, I'd pick either my 681 L-frame or my 8-shot Model 627 N-frame now that I have both a good speed loader and quick strips for it.
Or, I might just go with my Model 625 in 45ACP.
I guess for me, it would depend on what my mood is at the time. In any event, it would be one of my revolvers.