Do you have a dehumidifier running spring to fall?

No, we don't use a dehumidifier at all. I'm concerned about leaving it running when we go away for several weeks in the summer. I'd rather not do that, so I'm looking for a flooring that will work without a dehumidifier.

I saw some stuff at home depot that is compositeboard on top of some plastic "feet", like egg cartons, they come in 2x2's or 1x1s and snap together, floating on the cement floor. But our floor is not even and this stuff was expensive.

Do you have experience with cft in basement?

It may be too late but we tried this, it was awful, we ended up putting in carpet to sell the house. This type of tile requires a VERY flat, level floor. Their were cracks in the tile where the floor was not level and the glue started coming up through the cracks between the tile, it was just awful.

That said, I'm sure it would be a decent choice as far as water issues go, if you were able to put down down some sort of self-leveling cement-based product and the proper primers to prepare the subfloor.

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Here is a link that might be useful: Commercial flooring