From what I have been able to gather (on this list and out in the real world!
), Purchase has the most "prestige" of the three programs you mention for straight acting. However, if you were my child, I would not have you choose a program based on prestige alone. I would want you to choose based on fit, as in "how well does the offered program fit into what you see yourself studying and doing?" I also would want my child to visit each campus/school and sit in (if possible) on classes, as well as be able to talk to current students. That info, combined with the inevitable "gut feeling" you will get will tell you what is the right decision for you.