If I would had read all the above I would not have purchased my Cinema 400 this morning. I got a good deal on it and pulled the trigger.
I have the sound bar hooked up through hdmi and have not had an issue yet. Been running it for the last 8 hrs. Sound is good.
I regret not going for the cinema 600 or higher. The cinema 400 is not compatible with the connect app which has a equalizer to tweak your sound and I did not know that until after I setup my cinema 400.