I mean dont get me wrong, I absolutely love Columbia; it is my dream school and honestly I'd transfer even if I could not do OCI there. So it absolutely has nothing to do with rank hunting or career prospects for me, its just simply my dream.
But that may not be the case for you. But that may not be the case for you. I would take a look at the firms you want to work for. In the DC market Covington, Williams, Arnold Porter, and Wilmer Cutler come to mind as the most prestigious firms that are headquartered in DC. Go to their websites and check how many alumnus of your school and the schools you were accepted to are there. Check to see if they are attending the various OCI/EIW's.
But whatever you do, do not move out of the market you want to work in without doing your research.