I'd prefer UNC and UVA.
Florida, UGA, and USCe have a sort of pact to vote 'no' on FSU, GT, and Clemson. But with an expanded conference and a lack of other SEC programs in a similar situation, I don't think they could block it anymore. A&M had been in the same boat, but no longer. Maybe OU is now.
Anyways, UNC and UVA bring academics, recruiting grounds, expanded footprint (still in the south), and average football programs to kind of act as fodder for the football-crazy schools.
These conferences need to be wary...if all you add are elite football schools, you're going to have perennial powers dropping like flies.
Add UNC and UVA for those legit reasons, and let them take on the additional losses new teams cause.