You can economize on your time by just reading the transcripts (I and II). If you already know the people, it's pretty easy to reconstruct how it must have looked when it happened.
It is really stunning how bad on economics a lot of these candidates are. The best is Duncan Hunter saying we should "buy American" this Christmas season to create jobs. And Giuliani and Romney both refused to take up a questioner who wanted them to end federal subsidies for agriculture, because we need to ensure a domestic food supply.
What's funny is, most of the candidates were posturing about how they were going to use the federal government to crack down on the flow of illegal immigrants. So we're worried about foreigners sneaking in illegally, and we're also worried about us not being able to import food legally. Makes sense.
I do have to say I was impressed with McCain on illegal immigrants--reminding everyone that they are God's children too--and with Huckabee on the literal interpretation of the Bible. As far as the latter point, that just shows how ridiculous it is that we want to elect someone who can be an "expert" on 973 different topics. Huckabee is a minister and so he gave the best answer on that question. It doesn't mean he's qualified to conduct foreign policy, influence taxes, deal with immigration, blah blah blah.
(Note: All of these things come from Part I of the transcript, if you want to see for yourself.)