Asia - recommended airfare consolidator/TA for fares ex-MNL?

I'm thinking of taking advantage of a good CO fare from DTW-MNL and would like to know if anyone can recommend an airfare consolidator or other good resource from travel on to other countries.

I recognize that buying one ticket from the US to the onward destination may ultimately be cheaper, but I do have some sizeable CO vouchers that will probably make this the most economical (and most mileage rich) choice.

Thanks in advance.