My top four:
1) Notre Dame: If there's some way the SEC can snare them away from what's probably an inevitable move to the Big 10, then it's a no brainer. Big name program with a national fanbase. A lot of posters don't seem to be aware of the fact that Notre Dame was blackballed from being in the Big 10 years ago due to the Big 10 commissioner being anti-Catholic and anti-immigrant. One of Michigan's former football coaches was also ardently against them joining. Geographically, they belong in the Big 10, but hey, USC and UCLA belong in the Pac 12, so why not Notre Dame to the SEC? Good football and decent basketball. Is anyone in the SEC bold enough to make the offer?
2) UNC-CHeat: Another no-brainer. Despite Matt Jones' ignorant take that NC isn't really a southern state, it makes 100% sense geographically. This increases the SEC's media footprint substantially, as NC is a fairly populous and growing state, with two large media markets (Charlotte and the Research Triangle). Adding this school would raise the level of SEC basketball, and add a football program that's also become decent.
3) Virginia Tech: If we're gonna add a school in Virginia, they make the most sense. Despite some folks' take, VT is much more of the "state" school than UVA, at least sports-wise. UVA is kinda viewed as an elitist, snob school by a lot of folks. It's a public Ivy, basically. They've had some recent basketball success but have otherwise basically been an afterthought for much of their history, and their football program is completely mediocre. VT is much more prevalent in the big media markets, including in the Nova suburbs of Washington, DC. Again, this expands the SEC's media footprint, which is really what it's all about these days. Decent basketball, decent football.
4) Duke: Like UNC, they'd raise the level of SEC basketball, and like Notre Dame, they have a national following, at least in basketball. Football is sh!tty, but if we don't get UNC, they'd bring in the NC media markets, and what's not to like about another likely win for UK on the football side?
Alternates:
5) NC State- For much of the same reason as UNC, but it's the "lesser" of the two. No offense to the Wolfpack, who also, like us, hate both UNC and Duke.
6) West Virginia- Doesn't add much in terms of media markets, but they kinda fit culturally/geographically, and have decent football and basketball programs. Might be the easiest of any of the programs listed here to add. Kind of a "meh" addition, but might be necessary to get to an even number of teams. The natural rivalry with UK and annual football game could become the Hillbilly Bowl.
Lastly, let Clempsun and F$U rot with the remains of the ACC. Why add another football powerhouse in Clempsun? Selfishly, that would be yet another program UK would have to hurdle in football. They bring nothing in terms of basketball prominence and zero in terms of media markets. We already have USCjr. in the conference. Much the same holds true for F$U, though their football has been down recently.