<p>Along with Middlebury, my list would be (for undergrad). </p>
<p>Georgetown, Tufts, Brown, Columbia , LSE (UK)</p>
<p>All of which are extremely difficult to get into (they're all top-tier). My experience is that, for IR-minded students, each school is looking for slighty different qualities (aside from the top student bit). Brown seems to be more for administrative work, Georgetown for poli-sci, diplomatic-based, and foreign work, and Tufts and Columbia for IR that will branch out into business, law, or publishing. Just my thoughts.</p>