I know other member of this forum will disagree, but in my opinion the S&W K frame magnum is the best all around revolver S&W ever made. My three K frame have the best double action trigger pull I have ever experienced. If you want to complete a revolver collection a K frame magnum is a must.
Here are my three.

Model 13-2 4 inch

Model 19-2 4 inch

Model 66-4 4 inch