Thanks for all the input guys and the white lining is a result of the magic wand tool in photoshop which i hope clear away when i use depth of field.
Otherwise i will render with renderlayers and blur the edges around the building.

I've moddeled and painted the base color of the plane which I,after applying some grassy textures and such, import in the new york scene.

I think i will make another building in the background just to break up the treeline of the background but then i will finalise the project and will post it in the final entries section....