rhyme
I find it interesting that not one person cared about the repayment of the sign on. It's burning a hole in my decision process, although I'm not sure why since the salary bump would cover the whole thing in under a year.
I am too late in here. I would also vote for DC. Regarding the bonus, well, I am paying back the full tuition and 20 months of living expenses to my old company. This is huge money now; nevertheless, as we live just once I am willing to take this risk. I probably am more risk taker than you, and I would not suggest you to follow my decision path, but reading what you posted I could not forget the Managing in Organizations class we took together: you were convincing yourself regarding your decision, it was already made when you came here.
Let's celebrate grabbing a couple of beers this week or next if you are available.