Let me set the record straight about the OS version, because if you're still buying the JP version, you're ridiculous. The OS version is NOT cheaper quality. The only difference is the size of the case, the region of the dvd, and the fact that it comes with an extra insert that has the lyrics translated into chinese. Buying the JP version is a waste of time.

On that though, do NOT buy Korean versions. These features a holographic sticker on the cover of the albums that CANNOT be removed.