ok, so i will be buying an hdtv along with a low end surround sound system. I am able to get a good deal on a tv, the only problem, which may not evne be a problem is that it uses coaxial digital audio as opposed to optical. the surround sound system i am looking at also uses coaxial audio. so my question is can i connect my xbox 360/cable box through hdmi to the hdtv and then send the digital out to eht surround sound? will this give me dolby from both the 360 and cable box? if this configuration works, which i believe it should hten i am fine, or do i need to send the audio from both the 360 and cable box directly to the receiver? thanks for the help.