Completely agree that refinement can improve a thing - but to me those are still usually better as secondary experiences after trying the original. Interesting variations, having first experienced it as the creator intended.

Although I would exclude the director's cut of Aliens, because probably should have been the original, but wasn't released that way. That's that's my preferred version of the film too because it's how Cameron wanted it, rather than, the studio.

And I'm not fanatical about it, or anything. It's just a personal rule of thumb :-)

So, I would always go with subs over dubs, at least on first viewing.