College A Cappella Groups in Boston

I have applied to these schools, but I was just wondering which of the three has the “best” and “worst” a cappella scene (how prevelant are they on campus, do they compete, etc)?: Northeastern, Boston University, and Boston College

Also, how do they compare to colleges across the nation? I know they are not one of the top ones (although I have heard one of Northeastern’s a cappella groups does very well in the ICCA), but are the ones at these schools at least pretty good?