I cannot really help on getting doctors or how much does it cost, but I can tell you what I heart and my personnal experience about the pros and cons.
First you need to know what kind of malaria do you get in the countries you are going. Is it the Falciparum, i.e. the cerebral malaria from which you can die for or is it the more traditional one (I think this is what you should get in SEA), you get very sick… but do not die. Once you have determine that, you will know what medication to take.
From my past experience, I lived 17 months in Chad, Africa and the common malaria is the cerebral one (In the company I was working for, 3 employees died from cerebral malaria). So the only brand that can eventually prevent from (you are never 100% covered even if you are taking medication) are Malarone and Larium. I was taking Malarone because Larium was way too strong for me. But a lot of my colleagues were taking Larium and they were fine. The “advantage” of Larium is you take the pills once a week only, whereas Malarone is every day during your whole stay.