Dual-wield is superior over 2 handers/weapon shield wielding. I really hope that two-hand weapons have at least double the physical dmg from their counterpart, the one-handed, which doesn't seem be the case, judging from the beta and the diablo3.com website on where the physical dmg of the weapons is posted. The reasons are as follows: a) +% bonus to attack speed greatly increases dual-wield attack bonus, that it does 1 handers. Lets take an example: Say you equip a two-hand weapon with 1.0 attack speed (1 hit per second). A lvl 60 character can easily have a +50% increased attack speed if not more. So what does that give ? 1.5 hits per second, 3 hits in 2 secs, or 0.5 attack speed, if you want it in number value. A two 1.50 attack speed weapons, will automatically boost attack speed by additional 15% ( a fixed bonus when we dual-wield) so we have +0.225 attack speed just from the dual-wield. If we apply 50% attack speed (on the two 1.50 attack speed weapons) we get +0.75 attack speed, add on the the 0.225 from the dual-wield, we end with a total of 0.975 increase in attack speed. So in conclusion, a two-hand weapon will give as a poor 0.5 attack speed increase (with descent, 50% ias on lvl 60) where the two 1.50 attack speed weapons will give us merely double the amount (0.97). b) Now that we covered the efficiency of dual-wield when it comes applying +% increased attack speed, it is logical to assume that spirit regeneration will be doubled right ? So lets throw in some numbers here as well. A barbarian using battle rage-into the fray runed version shout (critical hits have chance to generate 15 spirit) can easily get +15 spirit more while dual-wielding. +15 spirit per second is a huge difference my friends considering the fact that hits generate only 5-6 spirit per second. c) I am not completely sure about this, so maybe someone from the beta can confirm, but i am pretty confident that spells casting animation is linked to weapons attack speed. No need to explain any further here i think... d) The only advantage, such as it is, that two-handers have against dual-wielders is DoT (damage over time) based spells (earthquake, rend, blizzard, and couple of witch doctor's spells). This spells, when applied on monsters are based on the dps calculated on your character screen. I assume that dual-wield weapons might have a bit more dps over two-handers but the sheer ammount of spirit regeneration you get (atleast double) will more than make up for it when you start throwing those hammers of the ancients and seismic slams.