We luckily have the ability to be patient and wait until full-blown P5 expansion kills conferences and potentially leaves some high majors homeless.
But as of today, I think Gonzaga is the only addition that would move the needle. It would be the main story on ESPN and CBS Sports' front pages -- giant picture, huge point size title, the works. Wichita State would have moved the needle a few years ago.
Dayton, Davidson, St. Louis all fit character of league and would be fine additions but don't have same pizzazz.