Hmm, yeah I didn't think about using a macro; that sounds like the way to go.
My old Onkyo receiver (65W/chan, didn't even have DD 5.1 decoding; only Dolby Pro Logic) had auto-shutoff/auto-turnon for the TV/aux inputs, which were analog inputs. It worked flawlessly.
I guess in this case the complexity of the 950 works against implementing such a feature? Dunno.
In any case, yeah a macro sounds like just what I need, thanks.