Bad news I'm afraid.
FoV (as an separate expansion) is not available on XBox at all - it's too large for the Live marketplace, and there is no disk release. Only PC gamers can get FoV (as a download, although there was a disk release in some places).
XBox users can only get DKS (ED + FoV remastered), which isn't compatible with ED save games because they changed too much when they were remastering it. So if you get ED and play it, then later on buy DKS, you won't be able to continue with the same character. You'll have to either start again and replay the remastered ED section of DKS, or start from the FoV section of DKS with a freshly generated level 35 character.
But on top of that there seems to be no Asia specific release of DKS - see Larian's response to this previous thread:
http://www.larian.com/forums/ubbthreads.php?ubb=showflat&Number=444826Hopefully another PAL version of DKS will work on your console like Larian suggested.
Welcome to the forums!