StarThoughts said:

I am pretty sure that the AC-3 track on Alien is a straight transfer of the 70mm mix and not a new mix. It was a selling point on the LD when it came out — granted, there wouldn't be split-surrounds, but the front separation (which was quite significant in this movie), discrete surround and dedicated bass channel would have made it worthwhile.

Regarding your grading for Aliens: I like where you're going, but I think there is just a tad too much red right now. That said, it's amazing how much more vibrant the image can be without the cold pall on the Blu-ray… the two-shot of Hicks and Apone is a perfect example.

Yeah it is a bit too red that's a factor of the LD. Just need to figure out how much to pull out. For reference as to what the changes are, here is that Apone/Hicks shot from various sources:

BD/LD/BD with LD Colors/DVD (Both 99 and Quad)

You can see I did pull a little red out but maybe more is needed. You can also see that the BD and DVD are very cool, compared to the LD's warm. That's why I used the LD as a source, not because I know it to be more accurate to the 35mm (none of the home releases are perfect especially the BD) but because it is an interesting alternative lost to the realm of laserdiscs (it was according to LDDB sourced from the negative...)