The second movie. It contains the adorable, sweet moments of when Sakura is attempting to confess her feelings to Syaoran and then someone comes in and ruins the moment. In the release of the english dubbed verison of the movie, it has a extra of Kero and Spinel-Sun fighting over a piece of tabuaki.(sp - sorry if I spelt it wrong.) Funny and cute.
So.. it gets my vote. ^_^;