Im gonna be 70 soon, what specc should i be then if i wanna do arena and BG alot? because dual wield is fast, but 2hand is stronger... and arms is 50% reduced healing right?:P pls let me know

arms

fury is only good when no one is hitting you, but I think that won't happen often

Arms hands down, great burst damage, Mortal strike, sword spec.
but you do want to get fury talents like cruelty and unbridled wrath.