I hadn't thought about the ACC, but I will. I'm not a fan of the Big 12, and I'm not really a fan of the PAC for many of the reasons you state, including, time zone, apathy, and the pro-sports cities. They do have many of the large TV markets, though.
The ACC does have NYC, Boston, Miami (including much of South Florida), Atlanta?, and North Carolina?. I just don't know if any college does very much for NYC, Boston, Miami, and Atlanta.
Notre Dame and UT are the plums waiting to fall from the tree. If Notre Dame, UT, and OU would partner up, conferences would open up the voting and the checkbooks. Blackballs would be removed from the inventory. Networks would start salivating and the bidding would probably set a record that would never be witnessed again in modern times.
I am going to sleep on that thought and dream.