I think content and quality are the most important things to consider when choosing a course. If you decide to do an intensive course, you will be studying for 4 weeks. My belief is that, for such a short time, quality of instruction and subject matter covered are more important than the place.
As you haven't decided yet where you would like to teach, then the course really is the deciding factor. For people who know where they want to work, I suggest they find a good course in their chosen country. This is not the case for you.