Bro, go for it. Live your dreams and follow you passions. Never be let down by criticisms. I have Asian chicks just for fun but haven't thought about marrying them. Filippino gals would easily adapt to PNG when compared to Japanese or Chinese.
Moreover, it involves a bit of sacrifice. Firstly, your income must be stable and guranteed in order to avoid problems later on. Also, your family must accept and agree with your choice coz there could be resentment from your community esp, when family members expect much from you and seeing you being "taken away" by some purse-oriented Asian chicks. If she is genuine to you and would really want to be your partner, both in good and bad times, go for it. Why not?
Finally, consider one more thing; kids. Make sure that she is productive and not sterile coz one beauty about marrying foreigners is to have lovely kids. So long as she is faithful and does not seem a liability of some sort, go for it. However, if your income is guranteed, disregard my advices.