The Australian Taras Bulba BD is mono, although is certainly seems like the MGM DVD was in stereo, as I recall. I don't have it anymore, I gave it away after I got the BD.
The Australian BD is pretty nice. It could be a little cleaner as far as debris. It has the kind of opticals where they don't cut back to the original footage until the end of the shot, so there are some sections with longer dupes than I would like. I doubt that would change with a TT...