I'm going to say for the coffers for the ring/neck = maybe. I haven't done it yet but plan to try.
If you are not going for the chest piece, I would say yes to the atalai gear.
I was going for the chest piece, and after running this over 30 times or 180 mini troll bosses, I have seen the plate belt (over 90% of the bear - one was monkey) drop 15 times, the shoulders 7 times, the boots 8 times, the gloves 10 times, and only one chest dropped (of the wolf). I got so sick of seeing the belt of the bear. On one run it actually dropped off of 3 different trolls. I wanted to punch my computer.
As for the chest piece (if you are alliance), it is claimed to have 2% drop rate. It has only dropped .5% for me. Then you have a low chance of getting the one you actually want. So, it could take 100 runs or so to get the one you need. Each run takes me about 10 minutes without looting and 15-18 minutes when looting. This is with a level 80 well geared DK.
If you can get the BoA chest when the patch comes out, it will be better than any version. I think it is even better than the horde honorguard chestpiece. I am just going to wear my of the wolf version or maybe the lich robes until it comes out and then switch to that.