Future, I vote for Memphis too. You keep giving her ultimatiums, drawing your line in the sand, and she comes back with a "compromise", which pretty much means to do it her way. My XH said that he never wanted a divorce, he just wanted to keep his relationship going with OW and sleep in the spare bedroom until he figured it out. If I would have let him, he'd still be there My sense is that your W is pretty similar.
As someone who cut the cord, I'm much, much happier now. We're cordial, and he asked for another chance not long ago, but he hasn't done anything that would make me think that he has changed.
If not Memphis, I hear Nashville is nice too! Either is better than Disney World, given the current circumstances. You can take the kids, even, if you want with you to TN!