I wouldn't count on getting into ANY Ph.D. program, but you definitely have your pick. You've still gotta be damn good to get into say, Princeton. But people with M.Sc.'s have shown they can research, and they can write a thesis. That's what they look for when they accept people to the Ph.D. program somewhere, so you will definitely fit the requirements.
Other thing is, if you work your connections, you can get in somewhere. I've seen some pretty dim people get positions, because some profs are desssssssperate for students!