I have an Nvidia Mac mini hooked up to my Dell 1209S projector via a 50' VGA cable. It works OK other than some pretty noticeable ghosting. My question is, would a DVI cable solve my problems with ghosting? The Mac mini has both DVI and VGA out cables, and the projector has both inputs as well. This means I won't be using any adapters. Will I get a better picture with DVI?