46 here, we could go bigger as it is in a large room, this is not likely to happen for a while though.
My brother has a 60inch and the furthest they sit from is 9ft, so close that you have to move your head to see it all, still at least they get some excersise watching tennis etc.
One of my relatives is a major soaps fan, records every episode whilst sitting watching them, she does this in case there is a power cut halfway through, she cannot get the fact that if there is a power cut the recorder will not record. I have tried.