Just ordered an Onkyo ht-s770 and a dv-cp702 DVD. I have Comcast digital and a regular 36" Sony TV.
So for connections for DVD I take optical out to the amp and svideo to the TV (choice twixt composite and svideo at this point). and for regular TV I take the stereo audio out of the TV to the amp?
Sounds good. From the DVD to amp for audio: optical cable; from DVD to TV, if your TV will take the inputs, composite will be "really nice". I also think S-Video is great, but it's personal preference. See which looks best for you.