Well, that was easy.
My wife just got home from Memphis, and I immediately began my sales pitch for keeping the 26X. As I mentioned before, she seemed to have been warming up to the idea of getting a 26M (both for the "shiny new boat" factor and the bigger rear berth). In addition, the destruction of the coast and the islands had a bigger effect on her... at one point (in the first month or two after the hurricane), she was essentially saying "what's the point in ever going boating again?" I insisted that, although our favorite spots and now cherished traditions may be gone, we'd find new favorite places. But lately she seems to be showing more signs of optimism.
Anyway, back to today. I even had a spreadsheet prepared, comparing the cost of keeping the 26X and repairing the motor plus doing some other fixups that are needed vs. selling it and applying that money to a 26M later ($3,700 vs. $24,000). But before I even finished the first sentence, she said, "fine, let's keep the boat." Turns out she had essentially the same thoughts on this as me while she was out of town. When I told her my goal was to get back to boating by next summer, her face lit up... she misses it as much as I do, and realizes the kids won't be little forever.
So, if at all possible, we will be keeping the boat. We just need to work out the storage details.
My only real fear with storing it on my neighbor's land is the motor, which I realize is an attractive target to thieves. I wonder if hanging a sign on it that read "note to potential thieves: this motor is busted" would be enough of a deterrent?

I'd consider removing it and storing it at home, but I'm not sure where I could put it (the garage is very small... but maybe I could put it in the shed in the backyard).
As a side note, I did run the motor for a little while today. It was a bit rough at first (hasn't been run in 7 months), but smoothed out nicely after a few moments.
--Mike