B1G, ainec.
All you have to do is look at the stability, the networks, the income, the academics, the quantity of the institutions and the people that run them.
Or would you prefer the drama that is being in a league with ND or Texas. How about such character driven institutions such as BC, Miami, Louisville, Pitt, Syracuse?
If we called to join the ACC or B12, this board will celebrate in a manner we didn't know was possible and we would fill the intertubes with semi-jovial barbs at our old friends in the ACC or the hayseeds of the lower midwest, but if you want what is best for every single program and the university itself. The Big Ten would be as close to perfect as you could draw up in the current NCAA universe.
Leave all other delusions behind.