Alien (1979) was not, i repeat - NOT - a 'sci-fi action flick' .... it was sci-fi horror. nothing remotely action flick about it.
also, Aliens was total garbage and pretty much set the franchise on a turd-sliding-down-the-porcelain-bowl-of-a-shithouse-shitter trajectory.
the mixpre ii has dual AD converters as well. the 32bit float file format on its own doesn't deliver the no-clipping etc results they are advertising (could still record clipping/distortion from the analogue entry point), it is the use of dual AD converters AND recording to a 32bit float file format.