I don't agree with you that the "big 2" choices in candidates are contrived. It should be obvious that the last two presidential elections offered choices of vastly different approaches to the country's problems. As does the upcoming election.
Is there any question that had Al Gore won in 2000, or Kerry in 2004, things might very well have been quite different than they are today?
I know that hindsight is always much clearer. But, the problem is not as much with the choices offered as it is with an electorate the knows more about American Idol contestants than the positions of the candidates. People in this country are too easily fooled and manipulated by the system.
Either democrat, in my view would be much better that either McCain or Barr, but to my mind Obama offers a chance to bring something completely fresh to the table. To me it's worth the gamble.