Usher BE-10/20, what do you use to drive them?

Ready to take the plunge on one of big Usher. Heard them in Taipei HQ driven by Usher's own CD/pre/power with cheap wires and already sounded excellent, I am sure they can benefit from better front ends.

I have only seen one BE-10 in virtual system driven by Ayre MX-R. What are you using to drive your big Usher? BTW, is BE-10 "better" than BE-20 for music?