I'm not so sure about that one. Saber's far enough as she is, so simply resizing the image down would make the detail much harder to view. If we just cropped it, you lose the vastness of the sky and the lonely/sad atmosphere it conveys.
Not saying it won't work, since such things are only really known once you actually apply it. Just giving me reasons why I think it may not.
My own sig was actually cropped a bit more since I last posted. It was "off" because the height between itself and the avatar didn't match. It turned out that the detail I cropped out wasn't as important, in that case.