Quote from zeroRooterskorn is cheaper (a lot cheaper) then making a dual wield barb, and it's essentially just as effective
Pretty much this. I got my attack speed skorn (1430 dps, 165cd) for 28 million. If I wanted to get any where close with two one handers I would need to spend about 500 million.
I will be making the switch to two 1h's when that gold becomes available however.