I think you should get rid of both and get a Glock. Seriously.
It's easier to carry than a big ol' 686 or even a 4" 66.
It can have two or even three times the ammo, and in a superior caliber.
And you'll never have to worry about whether or not you should keep it, because either way, it won't matter.
So there ya go - problem solved, problem staying solved.