I have a bunch of HD (1080) movies that I would like to put on my iPad. However, by default Handbrake and iTunes seem to downsize my glorious 1920x1080 video to around 1024x400 or 1024x500. I want to take up all the screen space possible by double tapping, and this means setting the resolution to the height of the screen rather than the length. In Handbrake, what is the best resolution to be encoding these videos?