There are often special bonuses and abilities attach to weapon, whether they are single handed or not, one way to maximize the benefit is to dual wield (e.g. Crom Faeyr's STR bonuses and Celestial Fury's stunning ability), this is of course under the assumption that you have at least 2 slots (preferable 3) in the 2 weapon style and preferable at least mastery in your weapon-type style. It is a trade off between speed vs damage, 2-handed sword have higher damage potential while duel wield always seems to get more attacks per round. One benefit of using two handed sword is that your character can also use bows and x-bows, and dual wield cannot use range weapon (except when your character is a fighter/mage and can cast Melf's Minute Meteors, you get both the meteors' damages and the weapon on your off hand...imagine Crom Faeyr....Heehee
). Ok, I am rambling off topic....better stop.....
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