Well I am at the Ross School of Business and I feel Ross pretty much gives the best deal for internationals. You don't need a cosigner, the interest rate is prime + 1.75% (that turns out to be 5%), the lowest among the top 5 schools and repayment starts 6 months after you have graduated. The best part is that as an international, you don't have to submit any documents. Just ask for the amount of loan you need (upto a max of $69,000) and it will be provided to you.