The good conference tourney was the Big East's (I actually prefer it to the NCAA some years), but that's gone now (unless Tulane v Boise works for you)
Wait for the fallout, there will be another one or two monster east coast conferences. Catholic schools will add schools (see above) or join another conference. Can you imagine the Catholic School conference tourney if they add Xavier, Butler, VCU, Gonzaga?
The ACC is also stacked with basketball schools, as long as the football conferences don't pick it apart (seems likely). The Big East is going to be done after this, so Temple will be in play.