built my Paramount II's Dec 2015, and have Psvane 300B's. Played them for a while with my current 87db 8 Ohm 8" full range speakers (B & W 805 copies) and went back to my ARC Classic 30 amp. Then recently started playing the Paramounts again with my repaired 6C45P scratch built phono stage in the vinyl setup. Surprised to find the Paramounts seem to have plenty of power in the 87db rated speakers!?. I'm hearing no clipping. Also (as I think other people have noted), find myself listening at lower volumes, and music seems more articulate than with other amps at low power. Looking forward to getting other speakers- gonna try the Fostex BK16 with Fostex FE168 Sigma drivers. When I grow up, Altec 604H in I-don't-know-what enclosures.
Thought guys building 300B amps should know this. Thanks, Bottlehead!