As an epi person would probably say, "it depends." If you're hoping to go down the path of a PhD, DrPH, I would think about reputation, job placement, even success of grant funding. Going from a MPH to a PhD would mean you'd ideally have to get a lot of good experience, publications, etc. - might be easier at higher ranked, better resourced schools. I had this conversation with my advisor who went to Hopkins PhD and did her MS in Epi at Harvard. That said, sticker price anywhere sounds gross even for an ivy league master's! It's up to you to make the most at any program you're at.