Speaking of ET, I've been meaning to revisit Close Encounters for a long time. If I got the 30th Anniv. BD would the mix there be anything like the theatrical? I know the original 70mm LFE was sourced for the Collector's Edition LD (via lddb forums)
AF, GBU could be saved by adding the LD PCM to the Mondo transfer and then replacing the edits in the torture scene and the few other tiny bits to conform to the 161 minute US/International cut. The Italian exclusive scenes would remain Italian mono for the longer cut, with the MGM SE exclusive scene being the grotto which was never shown outside the premiere.
From everything I've heard the blu-ray is the same as the laserdisc except the stereo surrounds. I have the laserdisc and it is on my list to copy and sync so we can compare. Same with GBU (my favorite film). I have the laserdisc and the Mondo but getting in sync will be a task. I want to get a little more experience syncing up soundtracks up before I tackle GBU. I just finished my first. I synced up Temple Of Doom's widescreen soundtrack to the blu-ray and so far it sound pretty good (big thanks to Jonno for helping test the finished track)