I used to have a S&W M686, four-inch. Plan to get another. I'd tell you how it shot, but people who know me probably don't think I can shoot that well...
Seriously, it didn't necessarily shoot better than my M66, but the added weight did make it easier to hold tight on target under magnum recoil. The knowledge that it will withstand more firing with mags without showing wear as soon is an incentive to have an L-frame gun. And they do balance very well for fast DA point shooting, with that added weight out front. The cylinder timing holds up better than on the N-frames, because the hand isn't having to shove all that added steel around every time.
I think you're going to like that M586, and it will likely hold its value better than a Taurus, if dealers in my area are any indication.
Lone Star