Decware Zen Torii Mk 1V on Ebay right now. I have two pair of Zu speakers and have tried various amps. The Omen Defs still need a bit of power to perform well and the tone of the Decware amps fits right in with the Zu sound.
Most of the amps noted above will sound good with your speakers but I believe these will sound just right.
Most of the amps noted above will sound good with your speakers but I believe these will sound just right.