I like the photoshop effect, and I agree with hepburn about the plane position and killing the seagull. If the whole outline of the plane had sky behind it, it would work better.
But those planes are a bit quick, and it is difficult to get the perfect shot in the perfect position when you're taking something like that, the difference in time between the right and not so right place must be a fraction of a fraction of a second. I spent yesterday afternoon trying to photograph bikes, so I know how much of a fine art panning fast moving objects is, whether its a bike, car, plane or whatever. Well done for what you've got though!