Harmy said:

I don't think DVD even supports discrete 6.1 but I could be wrong.

It does, several DVD's were released with DTS-ES 6.1 discrete audio, Se7en is one that comes to mind. But I really don't see the need for a 6.1 configuration when a 5.1 configuration makes the original six-track mix justice.

Long time since I watched this movie, IMO it's one of his weaker films but it's very ambitious and technically extremely well made, great performances from Biehn and the always great Ed Harris.

The NTSC DVD is supposed to be more detailed than the PAL release, is the HD version the '89 original or the '93 Special Edition?