The problem seems to be that there don't appear to be any guaranteed starters available in this draft. It's one thing to draft a quarterback you think can be a starter, it's quite another to draft a quarterback that you DON'T think can start in this league, but you're hoping for some sort of miracle, or that your scouts have horribly misjudged talent. Which is a whole other issue.
You have to trust your scouts I guess. If they say you're looking at the next Christian Ponder then you have no choice but to pass, no matter how badly you need a QB. It's just a waste otherwise.
As for trading down, I'm against it this year. Stay high and get talent. I want the best offensive lineman available, not the 4th and 5th.