Frontline, The Choice 2008

I watched 4 of the chapters of the Frontline, The Choice 2008. Will first of all i did not know that Obama started his campaign for presidential during 2004 or he was thinking about running for president. When i saw him speaking for one the first times...he really spoke his mind and thought about every little detail like little kids on the street with no home or an Arab family that is being rounded up. These worry him or bug him. I thought his speech was cool and i thought it was very interesting. Then i did not know that McCain was an outcast to the Republican party for several years and how he wasn't really liked by the party too. I honestly didn't know that he ran for president during 2000 and that he was against Bush. But my question now is who would be the best president Obama or McCain?
Honestly i think that the presidential race is between Obama and Plain. I know that i need more information on their views and that's when i can make my decision. But I'm kind of leaning toward Obama.....what do you guys think?