Well since you have a 3805 then all component could be routed through it but if you get a dvd player with DVI or HDMI it will have to be directly connected to the tv.
For instance, my Oppo has video processing via the DVI and not to the component. In most of the reviews for the Oppo they highly recommend using the DVI port. With my old setup, everything was component which was all connected to the Denon. In my new setup the Oppo has a direct DVI -> HDMI connection to the tv while everything else (sat and old dvd) are component to receiver.
Unless you get the new 3806 or 4806 which have HDMI switching, you should use a direct connection to the tv for video if you chose to purchase a DVI/HDMI player.
