It's already obvious that the winner will be either Obama or Hillary Clinton.
Whoever wins, a historically important election will be won - if electing the world's largest country's leader is not a big event in itself. The US will have either the first female President or the first African-American President. So far, rhetorics does not seem to point this out so much, but I guess it's a factor for the people.
The largest problem I can see in every election is that the great majority of the people cannot judge who is the better candidate, only based on who is more sympathetic to them It's practically all about rhetorics - who says what and how. Who will do what when elected is a different issue.
If I were an American, I would vote for Obama. He is not as experienced as Hillary, there is no doubt of that, but I think that can be a good thing. What I mean is that HC acts based on what is expected from her, while Obama acts what he thinks is right. That's why he seems to be a better candidate to me. Correct me if I'm wrong, but independence is an important value for Americans.