Until you have all the heroic(25man)naxx SBV gear, you will be better off in dps gear with a sword and board. However once you have all the gear from naxx, it will be superior for arenas. I am looking for where i saw it at, but there is a warrior that has said gear, and his shield slams hit for 12-17k in pvp/arena. I tried arenas this week in my pve gear and it was pathetic...looks like ill be spending my honor after all :(