I'm planning on upgrading to DirecTV HD package soon and was wondering what source material is used for movies broadcast on the HBO, Showtime, or PPV HD channels. Will a movie shown on HBO HD look better than the same movie on DVD? Do HBO, Showtime, etc. use the same film transfers used for DVD and simply upconvert or do they have HD specific film transfers used for broadcast? Also is the aspect ratio scaled to 16:9? Just curious, as the upgrade cost to HD is a little high for me, and I'm hesitant to take the plunge when there's still not that much HD programming out there yet that I would watch regularly.