2H or Dual Wield for a Melee-only Hunter challenge?

Kind of a stupid question, but I was wondering. I am doing a melee-only, no pet challenge with my Hunter, currently lvl 28. Is it generally better to run a 2H weapon or to dual wield?

What could be the deciding factors when choosing between these two options (besides the quality of weapons available at any particular moment)?

Obviously I am in the survival talent tree, there is not much in terms of variety when it comes to talents with this challenge.