I plan on rolling a fairly balanced Barbarian that sacrifices points in PER/RES in order to beef up Might, Dex, and a bit of Con
As such, dual wielding seems to be the best route to go. It'll be faster and allow less opportunities to be interrupted, and I have more choices to equip weapons that can compensate for any weaknesses - eg., hatchet to increase deflection, a mace to bite into DR, etc.