I think it depends on what your house and neighborhood look like. If rural, the gambrel or middle one; if you have a modern house or are in a more urban environment, then the top one. Personally, I would choose the top one if it fit my neighborhood as it is definitely the most stylish... but as we have a very old house, I'd have to get the middle one as the simplest and least obtrusive. They are all nice - can't go wrong!
Cheers,
N. VA