I don't see Boise State or SDSU either. SDSU does not add a new market and Boise State adds a very small market. If they want to expand in the short-term (not saying they do), I would go to UNLV, New Mexico and Houston. Those would be three new markets and get them into Texas. Maybe only add Boise State if they get those 3. But that would be like getting the consolation prize when you were shooting for the stars.
Why not BYU...they seem to be a logical addition with a bigger national following especially among western states.