Something you also should keep in mind is whether or not you're actually going to enjoy or dread farming on that character. You're going to have to grind those levels again if you switch characters, which can get frustrating.
(Tangent - @Aerialus: Can you send me this build or a discussion link? Curious to see why it's the faster than WW. I assumed it was always WW because of its sprint and attack on the fly.)