Best Class A Amp under $2,000 used?


Looking for a Class A Amp (USED) to join with a Wadia 321 DAC and Dali ms-4 speakers for digital sources.  Budget around $2,000.   What are some good possibilities in this range? 
puffbojie
I went with the Pass Labs XA30 but use them for smaller book shelf speakers (KEF 201/2) -not the Dalis.  I absolutely love it.   For the floor standing Dalis (euphonia ms-4), I went with a Modwright 150 SE set up.