I would go with the brooch if I were you. I have found occasion to use the barbed choker but that's only when I'm shooting for passive uncrushability and not a real gear set.
The expertise and hit rating improve your threat straight off which is good, but the real benefit of expertise is lowering the enemy's ability to parry. It's too nice to ignore that as a bonus, 1% fewer parries is going to benefit your more than 1% more dodges in most circumstances on a boss. It's back to back to back boss hits that kill tanks. >