I think Nadal, because he was the last one to achieve it.
If someone is close to winning a career slam again (lets say 10 years from now) people would say "Nadal was the last one to complete a career slam" just like they keep saying that Agassi was the last one. I think people will talk about the last one the most
good point there
Yeah i don`t think we`ll ever see Murray or Djokovic getting close to winning all 4.. the next list of future champs also don`t look like their going to be able to dominate on all surfaces,, so if Nadal manages to pull it off then it will probably be a long time before someone else equals the achievement..
Still i think it would be awesome if Nadal won USO 09,, because 2009 would forever be remembered as the only year in which 2 career slams were completed