If you really know that you want to do entertainment you should stay in New York.  I work in the entertainment industry in LA and know how connection based it is.  Even though BU may be a better school overall, entertainment is pretty much only in NY and LA.  In terms of contacts, internships, etc. NY has WAY more to offer than Boston. 

My vote goes to BC!

The only thing I have to add to this discussion is that while I was doing a course on International Conflict Mediation at The Hague last summer I ran into quite a few law student interns for the ICTY (International Criminal Tribunal for the Former Yugoslavia).  Most of them attended law school outside of the US or at schools like Georgetown, Columbia, etc. however, there was one guy from UC Davis who I spoke to at length regarding studying international law at Davis.  Basically, he said that it was very doable...maybe not the best selection of courses in the world, but enough to make it worthwhile.  Also, the only reason he ended up at The Hague was that a professor of his at Davis had ties to the tribunal and his letter of rec snagged this guy the internship.  I'm sure that doesn't really help your decision, but I thought I would pass my firsthand experience along anyway.