Smallfry: I agree with "TheLastLemming76" I much prefer (to exclusivity actually!) the older pre-hillary lock Smith & Wesson Model 686's.
In my experience they are a much better/safer/wiser investment of ones monies.
Many sellers actually go to lengths to try and conceal the fact that the Smith revolver they are trying to sell are "hillary-holed".
Lesson there.
What will be your primary usage of the Model 686?
I really LOVE the pre-lock Smith & Wesson Model 686's.
Anyway last month I bought my 6th (sixth) Smith & Wesson Model 686 and I now own models with barrels in 2 1/2", 4", 6" and 8 3/8" lengths.
Again, I much prefer the pre-lock models and with longer barrels when field accuracy is the prime motivation.
Best of luck to you with whichever model you get.
Hold into the wind
VarmintGuy