I don't think the SEC will add FSU. It would add another in-state rivalry, which the commissioners have already said they would NOT like to add.
If we were to add another in-state rivalry, I would say it would be GT, because they were once part of the SEC. I think we would be more likely to add Mizzou, WVU, NC, OU or another team like that. Any farther west than OU/Texas A&M and I don't see it working well into SouthEASTERN Conference.