Yes - I haven't analyzed the capabilities of receivers you are looking at; make sure you can switch video in addition to audio to different zones (that's a more advanced feature than just switching the audio). You'd just hook up the DTV box via both HDMI and analog.
The problem with the digital audio is that there aren't two D/A decoder paths present in the receiver. Since you don't have to decode the video, passing it to another zone shouldn't be a problem.
But I think those kinds of questions represent the sort of nuance that you should confirm with specific receiver models.
