I'm reading that right now. In my ideal, getting TAMU, TCU (to join the West) and Florida St., Miami (Fl) (to join the East) would be the dream scenario should the SEC expand.
Now, if it could be Texas instead of TCU, that would be so epic it'd be unfair to the other conferences. But, I don't see much reason for Texas to join the SEC. I think they'd rather become Independent like ND instead, but the Pac 10/Big 12 merger (which is essentially what it'd be) and the money that's on the table will probably win out.
But TCU, while smaller and less prestigious, is located in Ft. Worth. Getting the Dallas/Ft. Worth area, which is one of the biggest markets in the United States, would be major. TAMU is, I believe, the 2nd biggest university in Texas, and is about maybe 1 and a half hours away from Houston, another major market. TAMU and TCU would provide a concrete SEC foothold in Texas, bring in major TV money, and get SEC teams in front of eastern Texas high school students (which would benefit a school like UT greatly, as they have to recruit nationally).
I don't want to expand just to expand, but if we did and keeping my expectations realistic, then TAMU, TCU, FSU, and Miami are the ones I'd hope for the most. TAMU would probably be the top "get" among the 4.