I reckon the Pumas will be really tough at home. Imagine having to fly over there, would be a pretty hard trip I reckon.
Travel will be a factor for sure, but I really can't see it being much harder (for Aus/NZ) to fly to Argentina than it is to fly to South Africa. This is where experience will come in and for the first couple of seasons, I feel that Argentina will struggle the most with the traveling demands.
Yeah Fox Sports show games when it's on occasionally near mid-year. Japan actually won it this year, they've improved out of sight overall (bar their World Cup performance).