I live in Singapore. If you are going to buy new, I would buy in the US and ship through your company. While there is good selection here, I don't think it is as good as in the US. Plus, the weakness of the dollar mades US branded speakers a good value right now, and you don't want to buy them in Singapore when the shipping could be borne by your employer.
As for amps, look at Wyred 4 Sound as they will do whatever voltage you want.
As for amps, look at Wyred 4 Sound as they will do whatever voltage you want.