What Sensitivity with Tube Components?

Indeed!
Thanks for the input.

Since you're not using stands, are you using some kind of acoustic footer so that the speaker is decoupled from the furniture? IOW, are the bottom of your speakers sitting on the bookcase or are they raised?

If brightness is your problem it is the B&W speakers. With the free-mounted  aluminum tweeter you can change your gear till the cows come home and they will always be bright. My friend had the 805’s and they would drive you right  out of the room! BTW, I had the original 802's many moons ago and they were also bright! Power is not the problem,the speakers are!

I agree with yogiboy - it's the speakers that are bright. As far as power I drove Dynaudio C1's with 40-70-110W Octave tube integreted's with no problem. BTW the C1's are rated at 85db. What I did notice is with each 'bump' up with power there was a hair more control in the music.

The room with glass walls on both sides contributes to the brightness.