I recommend starting
here (prot), or
here (fury), or
here (arms).
Some good names to look for: Archimtiros, Warriorsarri, and Artunias. There are some others who definitely know their warrior play, but those 3 are who i see a lot of numbers from. One thing to realize, however, is that you won't find much public theorycrafting going on atm because there is serious tuning going on, probably on a pretty much weekly basis for a bit. So the responsible theorycrafters are keeping their numbers to themselves until things become more stable, to minimize the risk of the wrong numbers making the rounds in a couple months when things are more stable. Hope that helps!