B & W 802 Nautilus and Monoblocks

I have B & W 802, and looking for amps. Which amps would be a good match----Classe CA-M400, Pass Lab X600, or Krell MCX350? Thanks for your opinions
With those speakers, I too would choose the MC501.

Read Brian's great thread. He had 802s and ended up using McIntosh amps with them after trying many others: