Straight to the point. I'm a raiding Moonkin, but I recently had to off-tank the bear in the third boss of heroic Underbog. Wasn't difficult, but it did make me see the need for a new set of gear. I've been looking for a good set, and so far the only one I can think of is the Heavy Clefthoof set. Now, it's a decent set from what I can see, but it IS only 3 pieces. I have many more gear slots.
I won't be tanking something like a Karazhan boss because I don't intend to respec, but I may end up needing to off-tank something like one of those Ravenguards found in heroic Sethekk Halls. The question is, what would likely be some good pieces to go with the Heavy Clefthoof set (should I even bother with that set, for that matter?)? Keep in mind, I've managed to down every boss of Karazhan up to the Curator, and I can handle most heroics, so I've got a pretty good range of places I can go.