Raven Osprey with Spatial M3 Sapphires

Probably just air rushing in to fill the vacuum.

Audio Hungary is another contender. I would hope a $6k amp is better than $4k.

This thread has gone on so long I now have had my Raven Blackhawk more than a month. Also last month at Chuxpona 21 we had the opportunity to run the Blackhawk with some 87dB speakers. https://systems.audiogon.com/systems/9675  We had no problem reaching nice loud levels even in spite of these power hogs! Also and even more importantly the Blackhawk made them come alive! They were first used with a high power SS amp that had them running rather closed in and veiled. With the Blackhawk it was a remarkable transformation, with a lot more open, detailed and expansive sound. Anyone listening blindfolded would have sworn the amps were reversed, with the Blackhawk sounding much more powerful and in control.  

Back when first asked I was sure the Osprey would be fine. Now I can say for sure you do not even need the Osprey. Save your money. Get the Blackhawk. Thank me later.

Your speakers are 92dB and you don't crank it loud so no problem. Heck even if you do crank it you should still be okay. The extra ten watts by the way is negligible. In case you were thinking you need it, the difference is a little more than 1dB. The main advantage with the Osprey is access to Dave and his collection of NOS tubes. Any other way I would never bother with tube rolling. But Dave knows his tubes. Good advice to call him. Either way, Osprey or Blackhawk, you should have no problem.

My previous speakers by the way were the same 92dB as yours. My room is bigger, and I do enjoy it loud. 50 tube watts was plenty. While the difference sounds like a lot in watts, it is only 2dB. Again that is in a bigger room and playing quite loud. I'm quite sure you will be fine on power.  

Sound quality wise I am quite sure you will be better than fine.