I recently purchased a mitsubishi 55inch widescreen tv. I have a sony dvd player and regular cable(for right now) It is an hdtv, but I do not have hd yet. I was wondering what I can do to make the picture quality a little better on cable and while watching dvds? For example, I have read about component wires. Is this all that can be upgraded for quality? Or is there something to do with the settings of the tv? Any input would be appreciated!