I'll jump on the K frame S&W revolver bandwagon. The GP Ruger is a bigger and heavier frame, like a 686 smith. The K frames are lighter, more compact, most have very smooth working mechanisms, and have been proven durable. The model 66 is a good one, but for concealed carry, I stay away from the models with large adjustable sights. The model 64 and 65 (and many other blued offerings) are small rear frame sight/small front sight models. Ruger also used to make a model called the speed "6", which was a smooth shaved security six. I was issued one for work, it carried and performed well also. It was the same size and weight as a "K" frame Smith. Hard to go wrong with proven designs.