The best way to transfer money to SIN.....
So far, I found the classic 'cash is the king' to be the best. Yes, carrying cash, have no side effects, except there is a cap at US$10k per person/trip. The x-rates are likely the best (at money changers) in SIN to convert your US$. There are no commission or any other charges. Just shop around for the best rates b4 settling. Just make sure you mostly US$100 bills (as the higher denomination gets the best rates). Just a word of caution, evaluate the 'cash risk' against the US$200-300 savings on a US$10k wire transfer.