I do not know..

Right now as it stands here is what I have connected to the TV:

1. Denon 2910 -> DVI
2. XboX -> Component
3. Sony dvd Changer -> Component
4. Mythtv DVR -> S-video
5. Cable -> coax cable

I am pretty sure that I do not want to take my 2910 video through the 990, but other than not wanting to have a "middleman" I have no reason why...

My only gain could I guess come from the mythtv DVR being upconverted to component...

hummm....