David you are right and you will be absolutely fine. I would do it with just one chain per speaker sized so the speakers hang at ear height.
Even if you did not cross out at 100 Hz you would be fine. The mass of the cone assembly is far less than the rest of the speaker. Imaging will be just as good as if they were on stands and because you are crossing out at 100 Hz distortion levels in the little woofer will drop considerably. It should make a wonderful office system, a lot better than the two Sonos speakers I use.
Even if you did not cross out at 100 Hz you would be fine. The mass of the cone assembly is far less than the rest of the speaker. Imaging will be just as good as if they were on stands and because you are crossing out at 100 Hz distortion levels in the little woofer will drop considerably. It should make a wonderful office system, a lot better than the two Sonos speakers I use.