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
Pass Aleph 0s. It has a lot of power, so it should be able to drive just about any speaker. Next to my Krell 250, the Pass was a much better sounding amp in just about every way. The Krell did bass a little better.
Yes it is good question.  I want one silver in relatively good shape about 4-5 years old.  I'd like about 250 -300 watts.