Thanks for the info, Russell. Good to know about your Vizio's connectivity issue. I don't have cable or satellite. 100% of my content will be from DVD player, or PC via WiFi. So that's an issue I haver to look into.
I found that the H/P Out is indeed a headphone out. I still haven't found it listed in any online specs, manual specs, product boxes, etc. Multiple manuals I found when Googling it last night were all imaged, no available text-search. Spent lots of time but couldn't find mentioned of the H/P jack. Today I found a searchable Adobe version of the manual, but the specs in there still don't acknowledge that jack. FInally found a small section on connecting headphones, the only place where that jack is mentioned.
I cannot see any other way to get analog audio out, but even in the manual I can't find a comprehensive list or diagram of all the In/Out connectors. Extremely poor job of documentation across the board. I'll check the TV out tomorrow at Costco and post what I find.