Re: HD Box Using both HDMI and component/composite video, simultaniously
As discussed on Digital Home, there is no significant difference in PQ between CV and HDMI on an HDTV, especially if the input is properly optimized. Obviously 4k would be different.
You could also use an HDMI switch as an alternative. Ones that are powered are typically more likely to work properly and some of them have remotes that could be programmed into an input sequence like in a Harmony or similar programmable remote.