I wouldn't say that I upgraded from Thiel but I would say that I augmented my available speakers by buying a big pair of active ATCs. They don't make me like my Thiels any less but they do some things that the Thiels wont, like play very loudly. They are a bit more satisfying on large scale orchestra or meaty hard rock than the Thiels. The Thiels are better with small scale stuff and at lower volumes.
