Well said, Cloud, though I wanna add one thing. About the scene in AC... while it's likely that she is indeed alive in the spiritual sense and in the Promised Land, that also could be a dream sequence. I doubt it, but I just wanted to add it.
As for Cloud and Aerith being together in death... I think it's kind of cruel to Zack. Why wouldnt Aerith meet Zack, her first love (and the one that actually returned her feelings completly) in death? And, is it possible for ordinary souls (ie: not the Cetra) to come to the Promised Land? Or will Zack and Cloud merely continue the normal path through the Lifestream and never reach Aerith.
And both of you are right in the relationship department... they arent going to stop this feud anytime soon. I wish they would... because while, for example, amratis supports CloudxAerith and I support CloudxTifa, we can get along and discuss things like adults... it's a very rare thing in the internet. People are very rabid and mean when it comes to discussion of who Cloud should be with. Not that I think the movie would stop that completly... let's say Cloud gets with Tifa in the movie... the most rabid and insane CloudxAerith folks wouldnt accept it. Same goes for the other scenario.