Both Axioms are easy to drive. Any modest or better AVR/pre amp will have no problem. I have not heard the Usher's but will admit they look very nice. Axiom does have custom finishes avail and some of the high gloss choices will rival the Ushers. Keep in mind though this does raise the cost but there is no difference sonically.

FireGuy
M22V3/M3ti/M2V3/Omega Super 5/Aperion 5C/OutlawLFM1+Sub/Denon AVR1906/YamDVDC750/AS AMP110