Hello, I'm new here. I believe this is the way it will be...
Ron and Hermione for sure. My parents argue the same way they do.
Harry and Cho. But they would never get married. Cho really likes him, but Harry doesn't really like her. He just can't resist a pretty face.
The rest are just secondary as far as I'm concerned, but the match up of Ginny and Neville is likely.
If you want evidence of why I think that Ron and Hermione will get together, in the interview of the Chamber of Secrets DVD, Rowling says that there is foreshadowing for books yet to be written in the movie that are not portrayed in the book. The example I believe she was poking at was that of when Harry hugs Hermione (he sees her as the sister he has never had) but Ron is afraid to hug her--he likes her too much.