I've never taken too much loan (small portion of my monthly expenses) and I've always overpaid on the loan. Well, the one with 0% APR I was not aggressive on, but the others I was. I don't recall any loan being above $330 or so, but I've made plenty of payments at beyond double that to knock down principle. Finally I think the only time I might have been upside down on a car was my first one, and that was because I put so little down--everything since then was big down payment, no fears of needing gap.
Not sure if I want to sign up again for a loan, but I don't have enough in cash to do so on a new car, and every time I go looking people tell me "buy new!" even on this board. You have to admit, buying new is buying the best years. Anyhow, I'd probably play the risk: keep money in savings but put down enough that I'm never upside down on the loan. If finances change and I need to ditch the vehicle, sure I'll lose some money but as long as I can get out and still have cash, well, that's the gamble, right? I mean, I can't change a transmission in my car, I can't have a garage queen, and from where I sit, I still have least 10 maybe 20 years of employment ahead of me. [If not at this job then certainly because I need to work to pay for life!]
I will say that manufacture financing was the easiest. I did a loan through a semi-local bank on used once, and the loan got flipped to some not-so-local bank that didn't do online banking (had to use Western Union of all things to transfer money). Left a bad taste in my mouth, would avoid that in the future.