|Rahxephon-Volume 3: Harmonic Convergence||=|
The Region 1 version of this disc was released some months ago. As far as I can tell, both versions have the same features, the same (few) episodes, the same extras (except for the previews), and even the same cover artwork (although theirs looks a little more saturated). It sounds like the R1 transfer is at least as good as this one.
You can probably be happy with either the R1 or the R4. I am happy to have bought the Region 4.