I got cut off before I could finish. We are meeting with the doctors this afternoon to discuss the next step. He is competent, and quite able to decide for himself - although he has some mixed up moments due to the infection. And in fact we arent deciding FOR him either, he is aware and wants to continue as well, but the doctors seem to talk to us as if he is not in the room and (at least seems to me) they are expecting us to decide.
In fact when I first came to the hospital and the doctor gave me the above options, he was prepared to accept my or my familys decision. I was surprised that my dad's say in the matter didnt seem to come in to play.

I suspect they dont want to worry him and let him get depressed, although he obviously realizes it may be the end.