CCW
You are on the right track with the Scandium pistols. I have a Para P12 which I carry IWB, (alloy frame), and I have a liteweight Commander in reserve. The only reason I carry the Para over the Commander is that I really like the Commander, and it is hard on pistols to carry them all the time. Some will tell you that the all steel pistols are the only way to go. I say bunk. If I carried as part of my job, and did not have to conceal, all steel would be my choice. But as a concealed weapon, that you hope you will never fire in anger or fear, the lightest is the best, as long as it is reliable. The S&W's I know nothing about, except what I have read, so you know more than me. Just don't let these guys talk you into carrying around an extra pound of weight when it ain't necessary.