New unit ordered, but still
don't know how I'm going to connect it to my 4K Tv, and my non 4K pass-through av receiver.
Except for a $350 hdmi splitter that *might* work that someone on another forum suggested - I can't find any hdmi splitter that truly passes a 4K signal.
For short term, will probably run the HDMI between apple TV and my television to achieve the 4K I've been waiting for - and then run an Optical Digital audio cable from my television back to Av receiver. I know this optical cable will be pretty limited in what it can carry - so not happy about this, especially considering I really value good audio...