I'm considering an Infocus 7205 projector. The product literature indicates that it accepts DVI, Component or VESA video input. My cable company (Time Warner) says their box does not have a DVI connector (SA Explorer) that's enabled. What will I sacrifice by using the Component interface instead of DVI? I've also noted that the box I have (SA Explorer 2200) only has L/R audio output. Don't I need different audio output (AC-3) to handle 5.1 sound?