A TV is useful. Get yourself a small cheap TV dedicated to setup. A 13" will generally be cheaper than a 9" (strange but true). Mine cost $79 at Best Buy.
Oppo 980H setup and use
I am considering buying an OPPO 980H for audio purposes exclusively because I do not have a TV, nor do I intend on getting one. However, I have heard that you have to set it up on the TV screen and you cannot do it otherwise. Is this true, or can I still set it up without a TV?