My undergrad (ivy league) advisor said that 4-6 years ago their top choice was to take people from Williams and the second was Courtauld, for what its worth. However, in the last 2-3 years, there's been a shift. I decided to do some digging. I found some of the recent Williams people at CUNY, Pitt, JHU, SMU, and Stanford. Don't get me wrong. Those are pretty respectable institutions. They just aren't Harvard, Yale, or Princeton.