I have now asked people to give me feedback on which poster draft they think looks best. This will make it easier for me to decide which one to use and I know people will think it looks good.
This image was favoured.

I think this was because New York is a romantic setting for a film, and the skyline helps to show the overall setting. The blue strip of sky across the top also provides a good space for the faces of Georgia and Ben.
There is a lot going on in the background which could make the poster look hectic and hard to understand, however the opacity will make it more comfortable to be viewed and the detail will make it more interesting.
Posted by Sophie.