imho smu and the pac 12 are a good fit. we fit in academically and are on the rise in football. the pac 12 would have a presence in texas.
the big 12 is not going to take smu. ut will make sure of that.
the sec is not a possibility.
the big east will not take smu. tcu will see to that.
big 10 is a very long shot but would be a brilliant stroke by them imho. just image the big 10 in big d on a regular basis. good for them and us.
acc too far away.