I just found this great article by a US doctor (why don't we have doctors like that in Europe?) discussing, among other things, why the TSH is useless once on meds containing T3, and who would most likely do better on NDT or T3 only drugs (I don't think I've ever seen anyone make that distinction before, but most doctors working with NDT seem to consider it the ultimate solution). Warmly recommended for anyone feeling confused about these issues!
This doctor also stresses that a TSH >2 means you are hypothyroid. Even though he talks about Naturethroid, that could easily be interpreted as meaning = any brand of NDT.