I'm not a sport's fan but if you asked my husband it would be 60" or more. We currently have a 52" and barely room for that. If we get a bigger one we may have to move out of the room to accomodate it.
Never watch TV sport, except Equestrian, & I don't hold my breath waiting for it to be televised.
But I would like the biggest TV it's possible to get, as I believe the 'in depth' & 'clarity' would be fantastic!
Would love to see Documentaries' on the bigger screen!