All three are good gliders, but bare in mind that the results will be limited by your choice of camera.

As I mentioned a low F-Stop on a good HD video camera will produce the best results.

That eliminates most RC Hobby cameras except for maybe the Hero Pro 2.

You will not be pleased with the the cheaper choices. ( Been there, tried that, was dissapointed, upgraded, tried again, upgraded, tried again... )

Offhand I don't remember what the specs are for the Spy Hawk, but it is likely to have too slow of a shutter speed for good results given the small size of the optics.