Pass Labs Aleph Amps & B&W Nautilus Speakers

Is anyone out there using Pass Labs Aleph Amps (Aleph 2's, Aleph 4's, or Aleph 1.2's) with B&W Nautilus Speakers (N802's or N803's)? What are your impressions (positive or negative) of this combo? Anyone using Pass Labs X Series (X250 or higher) with said speakers?