You could use either the analog or HDMI with the OPPO but the HDMI/bitstream option that Potatohead described above is the best as well the easiest connection for your OPPO. HDMI/bitstream will allow you to experience all the new audio formats and it will also let you use your Sherwoods superior bass managment settings as opposed to when using analog cables you have to use the OPPO'S bass managment and calibration which is limited and harder to setup.

I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne