The Melody I2A3 goes very well with Zu......I have bought and sold three of them and honestly still wish I had the last one that I sold. I have tried 10 or so amps and though others have been a little better, none were dramatically better, even at retail prices approaching $10,000. Out of those I tried, I recommend Art Audio PX-25, Coincident Frankenstein 300, Shuguang 300 Integrated from Grant Fidelity (within your budget), and my current favorite, Decware mini Torii or Tori. I am certain that any of those would be great, as a matter of fact I just bid on the Zu Presence pair on EBay and immediately ordered the Tori to mate with it but I lost the bidding. Good luck and keep in touch with what works.
