>>718390060
>>718390120
Already listed Alien movies >>718388787 I can't recall what's exactly wrong with 2 Theatrical Cut, but there definitely was something, otherwise would've just grabbed Theatrical as well.

For Covenant and Prometheus it's whatever iirc, just download any blu-ray rip.

Was going to re-watch all Predators, but for now I have no idea which one is better.

For Terminators, 35mm are the best.
T1 blu-ray is a mixed bag imo >>718389537 I don't like the new sounds at all https://www.youtube.com/watch?v=ushCOvynQNU
T2 blu-rays are completely fucked, they completely changed the colors. As other anon said, first japanese blu-rays were good, but it's probably impossible to find them.

If you care about the picture and sound quality and overall non-fucked versions of your movies, your first stops should be
https://www.movie-censorship.com/
and https://www.blu-ray.com/ reviews of specific releases.
Otherwise just check google, there's always some reddit thread for any popular movie.