If I may contribute my opinion:
I believe the Model 586 (prefer blued guns, myself) to be the best .357 Magnum DA revolver to come down the pike.
The 586/686 guns have the heavy, full lug barrel, which I prefer. Also they share the long cylinder of the Model 19, which will accommodate the longer 173 gr. SWC bullets I use at times. And I prefer the smooth combat trigger of these guns over the narrow ribbed, or wide target ribbed triggers, of the N-framed guns. And, the L-framed revolvers have a smoother DA pull.
As to the frame, the L-Frame is an intermediate size between the K-Frame and N-Frame, but does retain the K-Frame's grip. I find this grip a little easier to use in DA than the larger L-Frame.
I've gon through a number of .357 Magnmum DA revolvers, Model 27, Model 28, Model 19, and Colt Pythons, as well as having some experience with the Dan Wesson. I still carry a 2 1/2" Model 19 daily, but I still am of the opinion that the 586 is the best .357 Magnum DA revolver ever made.
These some of my pets: