First, the DVI switching is independent from the analog video switching - you will not get the 990's setup menu or any composite, s-video, or component video inputs via DVI out. All you will get is DVI inputs. That means that if you have any non-HDMI/DVI sources you will need to keep an analog video output from the 990. You'll need that for the 990's setup menu, anyway. That's why I use a combination of component and DVI outputs from the 990: DVI for my HDMI sources, component for everything else.