Unless you need video switching for 2 sources, I would just use direct connections to your display device. As far as the audio, your best connection would be to use the 7.1 analogs between your player and the 990. Using the digital optical/coaxial connections for audio, you will get normal DTS and DD fine, though any of the higher resolution audio formats will have to be in PCM.

If you want to view the 990 screen menus, you will need a component, composite, or s-video connection to your display device.