Yeah, the Japanese BR of T2 is pretty great. I don't have it, but I've seen screenshot comparisons. I believe it also has one full disc devoted to each cut of the film (so, one disc for the theatrical cut, one disc for the extended cut), unlike the "Skynet Edition," which has both cuts on one disc seamlessly-branched.
I remember a lot of people bitching about how "bad" the Ghostbusters Blu-Ray looked. I own it, and I think it looks absolutely perfect, grain and all. One of my favorite BR's, actually, for that reason - it looks exactly like I imagine it did in theaters during its original run.
Oh, and Sky - Back to the Future wasn't shot on Super 35, it was regular, open-matte 35mm. Same for parts 2 and 3.