Just my 2$, I had a look through the 70mm files and picked these as the look I would be aiming around:

I wouldn't use PS78 raw (it needs a slight Hue adjustment in my view http://tinypic.com/view.php?pic=2zh1mx1&s=5#.UtLWzrTu4g4 ) but any of the others I think are acceptable references. I'd be looking not so much as matching a reference exactly as getting an effect where it looks like I'm actually in the room with them, lifelike colours/skintones and lighting conditions. What would it have looked like on the set and thinking how much is a particular reference is getting in the way of that ideal version with weird tints, and contrast levels and stuff.