How about this scheme?
- Denon DVD component video straight to the projector with digital audio to the 990.
- PS3 and satellite HDMI straight to the TV with digital audio from each to the 990.
- Wii audio/video to the 990.
- CD digital audio to the 990.
- Component video from the 990 to the TV (for the Wii and any other analog video devices that might get connected to the 990).
In this scenario, the 990 handles
all of your audio, with the option of using the TV for satellite or PS3 audio if you really wanted to (since the HDMI runs straight to them). The Denon only works with the projector, so if you wanted to watch a DVD on the Toshiba you'd need to use the PS3 as a DVD player (which it is capable of).
Other variations on the above that exist but may not be any better would be:
- Use component instead of HDMI for the satellite box and run it to the 990. This probably will be about equal to using HDMI, but I'm not familiar enough with the DirecTV gear to know just how the H20 does with component vs HDMI. You would also have to have the 990 on for audio with satellite.
- Stick with HDMI for satellite as well as PS3 but use the 990's DVI switching. This would let you leave the TV on a single HDMI input unless you needed to change to the component input (which would be for either the Wii or the 990's setup menu), which would be a nice convenience feature. You'd need to have the 990 on all the time for audio in this case - which you'll probably end up doing anyway once you hear it.
Personally, I'd lean toward the layout described at the start of this post but with the second option (DVI switching in the 990) because it keeps the system as easy to operate as possible without sacrificing performance.