Ideally I envisioned using a scan converter instead of installing an internal video card (for mobility purposes) to play movies directly from a computer. It seemed a quick solution for the avi files I download instead of going through the whole conversion process, burning, etc. I am reading that most of the consumer models of scan converters don't seem to display the same quality video as an internal video card does. Can anyone recommend an excellent scan converter? When playing movies from a computer and displayed on a 1080i 51" screen tv, would the entire screen display images, or only a portion using a quality scan converter? Does anyone know the details why the same technology used for internal video cards cannot be applied to an external product (seemingly)?