It would depend on the plasma. For HD cable I would run component or 3 RG59 or a DVI or HDMI +2 RG59 for audio. For the DVD the same. For the VCR 3 RG59. This would change accordingly to accomodate differing cable boxes and DVD players. 480P must go over component video or RGBHV. Always run a Cat5E just in case. If the plasma has a media box you will be using a propriatary cable(or 2 or 3). Having said all that I would use a switcher or an upconverting receiver or a line doubler with a pass through. Usually I use a 2 inch greenfield and never have a problem