I have the new Comcast DVR cable box. I am using an S video and a digital coax audio cable out to a Denon 3803 receiver. What setting should the Denon be on? My choices seem to be Dolby PLII, Neo 6 Cinema, and SOMETIMES it says Dolby Digital or something to that effect (although, I dont know why it switches.) I was hoping for digital surround. Do I just have to wait until something on HBO that I KNOW broadcasts in digital? Any help is appreciated.