You have more than enough HP to handle tanking pretty much any heroic (though your ability to breeze through them with little to no CC might not be there for a little while) and ALL of Kara including Prince and Nightbane. I see you have a flask on, so accounting for that you're sitting at about 13k, which is a very healthy number. 1000 less HP and you could handle anything in Kara still.
Strictly from a badge perspective, if you really want to make a couple of quick upgrades, look into the Bracers of the Ancient Phalanx and Girdle of the Protector (rather than the Iron-Tusk). For larger upgrades, the Inscribed Legplates of the Aldor are pretty much the 2nd best pants in the game for you, and the Chestplate of the Stoic Guardian (yes, the 2.3 75 badge chest) is for the most part a better choice than EITHER of the new 100 badge chests (though not always). Also, the new Ring of the Stalwart Protector for 60 badges shouldn't be ignored. Right now you could use it and Andormu's Tear, but once you get another good ring like a Violet Signet you can probably afford to look for ways to replace Andormu's Tear (since it has no stamina).