Try to ignore whether a group claims some kind of "legitimacy" compared to another and look at the personal merits of the teacher that you are choosing. One thing to consider is that the famous "names" can be excellent teachers but that it's often the ones who are practicing quietly in their own corner of the world that have the most knowledge. I met a guy recently who was one one Professor Presas' early students and who has managed to stay out of the limelight and the political infighting ever since. He has excellent skills and from the little I've seen absorbed Professor Presas' Balintawak orientation. I'm sure that there are alot of guys out there with similar stories.
Best,
Steve