I have heard the Stratos with BW N-802 and they sound great! I have Silverline Sonatas II, which are very efficient (93db) and I can increase the volume quite high without strain and distortion. However, the Stratos are a bit laid back and just a bit dark when compared to other SS amps. This is something that I like as I listen to classical music over 90% of the time.
This said, the Stratos are very clean, detailed, musical and they do not cause fatigue. Slam factor is great.
Happy listening!