Big
The 58 version will be stronger and probably give you greater longevity. It may even be intrinsicly more accurate than say the 1851 or 61 Navy, but having owned and shot quite a few of both, I believe the Navy to be the most accurate for point shooting. The Navy revolvers point like lasers as the bore is right beneath the front sight. It's almost like a natural pointing shotgun. You just know when you are goint to break the clay bird.
I have a 51 Navy that I regularly use to take squirrel when I'm hunting with either a shotgun or long rifle. From time to time, you have a crittur that just comes a little close for the long guns. Put a squirrel within 10 long steps from my stand, and it's potted in the head with that Navy revolver.
Dan