I'd want to see the contract of ND being all in. Are they still allowed to have their own NBC contract money, or are they shifting all in to ESPN with the rest of the ACC? If it's the latter, and it's not laced with loopholes galore, all current ACC schools are in, there is a GOR as well as an astronomical exit fee (and MD pays the full $50 million), the ACC would have to the ability to rework the deal with ESPN, and team 16 would be a solid choice, either UL or some other school, I'd say ACC. You cannot discount the value of ND all in. They boost the value more than anyone in the country, especially with them now being a national player again. If they make the title game, watch how high the TV ratings are. While the B1G would be solid, travel would be higher, we'd have no natural rivals except for RU, the basketball quality comparison would not even be close - and the ACC would likely make a play at MSG for the tournament - B1G hockey would be bad for UConn in comparison to HE - airplanes as opposed to bus league (if you're a fan, you can easily see EVERY game of the season except for ND without boarding a plane), better top to bottom competition, deal with NBC Sports Network and NESN, it's not even close. Ask BC hockey fans if they want to stay in HE or go B1G hockey, they'll say HE.
That said, the scenarios I laid out all are fairly unlikely to happen, so if by the grace of god we have a choice of ACC or B1G and ND is not all in, it's not even close, B1G.