The biggest choice for western men and Asian Dating is which country to choose from.In Find Love Asia their are girls from:Thailand Philippines Indonesia Burma/Myanmar Hongkong Singapore India China Malaysia etc.
Choices can be made with the help of friends,who have Asian Brides and then with them recommending on their succesful relationship or perhaps you have a country in mind that you have wanted to visit or work in.
Your decision may also come down to stories you have read in your research on Asian girls.Also check legal and political access to the country of the girl of your choice.This is concerning visas and legal documentation,most western governments will have experience with handling Thai and Filipino bride cases,where as the same process in Burma/Myanmur may not be as clear cut.
For Australians Indonesia would be the closest destination yet most find their way to the Philippines and then Thailand where meeting Asian girls is a pleasure.
Your choice may also come down to religion.I think many western men would prefer as little religious involvement as possible as it is simply not the way we live,our lack of culture can be to blame for that,as we know with the Asian girls,their will be a religious connection,so it may then come down to what belief you can handle,Philippines mostly being Catholic/christian and Indonesia predominantly Muslim,Thailand and Burma predominantly Buddhist.
Language may also play a part,with the Philippines having the higher number of English speakers and the Filipino language easier to learn because of its spanish origin than Thai or Chinese.
It may also be a safety factor with Thailand considered one of the safest destinations,the country is safe to travel.The Philippines is popular with western travelers.Many Austrlian and New Zealanders travel to Indonesia,and find themselves mostly in Bali.Burma has some instability and a cloudy legal system,Cambodia and Vietnam are two countries that are rapidly improving and becoming more popular with western travelers.
It may come down to money,the cost to fly to the country.The average price of the Dowry or no Dowry at all,Thailand was one the cheapest places to go to and live,although now such countries like Cambodia and Vietnam will stretch the dollar further.
Hopefully in the end it will come down to the Asian girl who catches your eye,and the connection you make,if thats the case,then the destination is already decided.