Personally, and this is only MY opinion, I hated the original. I don't care if it won an oscar or is considered a classic, I didn't like it. I'm not a fan of Audrey Hepburn so I'd like to see another actress in the lead role to see if it changes my opinion.
I don't think Hepburn is a terrible actress, but for me she wasn't right for the part and I'd love to see someone who can actually sing doing it justice. I love the musical, so I'd love to see a decent film version of it!