There is no comparison. The Onix is hands-down the best choice. Strictly from a build quality standpoint, nobody can compete with the cabinetry, and the driver selection at this price point. As far as the sound, again with the quality of components that go into these, they are tough to beat at the price. Excellent bass response, great tonal balance,dynamics, and all of the imaging/soundstaging buzzwords apply. I have listened to these quite extensively, and with everything from inexpensive tube integrateds, to tube separates, and some pretty high end solid state gear. If you go with these you will not be disappointed.
