Placement
When looking at graduate programs, I strongly suggest applying for the PhD, even if you have no desire to move past the MA. It will increase your chances of funding and the investment that your program will put into you. You can always change your mind and get the PhD, which you are already set for. Going into an MA program only, will almost always come without funding and will alter the value you bring to the department.
I strongly suggest leaving for a better program following your MA if you were not directly admitted to your PhD program. The worst thing a better program can do is say "No" and you can continue as normal.
My research on placement can be found in the following articles:
1) http://gppreview.com/2012/12/03/superpowers-the-american-academic-elite/
2) http://gppreview.com/2013/08/21/pushing-up-ivies-institutional-prestige-and-the-academic-caste-system/
3) http://gppreview.com/2013/09/15/placement-efficiency-an-alternative-ranking-metric-for-graduate-schools/
Comprehensive paper) http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2303567
Power Point Presentation) https://www.academia.edu/4266759/Honor_Prestige_and_the_Academy_A_Portrait_of_Political_Science_Tenured_and_Tenure-track_Faculty_in_Ph.D.-granting_Institutions_2012-2013_
The first three are quick reads, the fourth is a comprehensive paper. The final link is a power-point presentation that I gave at APSA. The most important point, however, is that this method shows the competitiveness of these programs. Yes, it only looks at placement in R1 programs, but that's by design. I strongly caution you to pay attention to anecdotes and numbers (statistics without citations) from Profs or programs. If they don't have hard data, it's for a reason - the data doesn't reflect positively on them.
Many people will tell you a "truth" they want you to believe. I think that you should look at the numbers, read up on it, and decide for yourself. The absolute worst way to enter graduate school is unable to think critically.
Good luck to you all.