Two handed fury is far less viable for Alliance players considering they don’t have access to shamans or Windfury. You’ll note that Improved Cleave is now standard, as you no longer need points in Dual Wield Specialization. You’ll also need to grab 3 points in Two-Handed Weapon Specialization found in the arms tree, the talent choice that really sets the build apart.
...but, in my experiences, I found dual wielding to be fine, but only if you're Fury. I found that having two weapon swings meant having twice as many chances to crit, which led to lots more Flurry procs. At level 50 with two blue 1h swords, my kill speed was just about the same as when I used an epic 2h axe. And I wasn't even specced into the offhand damage talent. If I got a good string of crits, I could smack mobs down in 15-20 seconds, and easily hit Bloodthirst every time it came off CD.
For the standard, dual-wielding fury talent tree, you’ll actually place 34 points into the fury tree and just 17 into arms. This allows you to acquire both ranks of Impale in the arms tree, while maximizing any damage bonuses found in the fury tree. Options here include selecting Improved Cleave over Improved Battle Shout in situations needing more area of effect damage.
For each character level (up to 60), there will be 5 levels worth of weapon skill. This means that each different weapon skill requires 300 levels on a level 60 warrior. The reason why this matters is because of how glancing blows work on enemies. The basic concept behind weapon skill is that a higher weapon skill will result in less damage lost. With a lower weapon skill, your attacks have a chance of dealing reduced damage.
Meanwhile i’d suggest you go Scarlet Monestary with a friend (I was a mage, and i had a hunter friend, sometimes another mage, and sometimes a priest) — that will do just fine, regardless of gear. I suggest Library and Armory for the most Silk Cloth / Mageweave. – That way you can also get your little Tabard of the Scarlet Crusade, which I think is awesome. — It’s a small bonus to the grind 🙁