I would say that imaging and soundstage are very good. However, many people chase after a "deep soundstage" and in my experience this has to do more with the preamp / amplifier that you choose -- as long as the speaker has good resolution.
If I remember, these speakers sounded bigger than you would think, mostly because the top mounted ribbon tweeter causes high frequencies to reflect off the rear wall and ceiling. Some speakers are engineering to have a 360 degree dispersion (such as the MBL speakers) and this gives you the impression of a bigger sound. However, it can cause slightly less resolution because you are hearing a smearing of all the waveforms. With the Kaos Vox, I don't think that's as much of a problem because it's only the high frequencies which are sent out with reflections.
If I remember, these speakers sounded bigger than you would think, mostly because the top mounted ribbon tweeter causes high frequencies to reflect off the rear wall and ceiling. Some speakers are engineering to have a 360 degree dispersion (such as the MBL speakers) and this gives you the impression of a bigger sound. However, it can cause slightly less resolution because you are hearing a smearing of all the waveforms. With the Kaos Vox, I don't think that's as much of a problem because it's only the high frequencies which are sent out with reflections.