I have an iScan Ultra connected to my AE100 Projector via VGA cable. If I upgrade to a projector with DVI input, such as the Panny 500, which DVI cable to use? Digital? Analog? The one that does both? What do they look like and how can I differentiate them? DVI-I or DVI-D or something like that? I'd need a 25 foot cable minimum.