[Hedonism]

Hey guys, I need help!
 
Currently, I own a pair of D2000s, and I recently decided to get a better amp for it.
 
I'm stuck between buying an AMB M^3 (w/ Elpac wall wart) and a Matrix M-stage. 
 
Which amp is better suited for the D2000s? Can someone who has listened to both amps help me choose?
 
Thanks in advance!

 

[Mad Max]

M^3, most likely.  And it would be an upgrade over the M-Stage, if I'm not mistaken, plus lower output impedance than the Matrix amp to boot.