Pass Labs XA30.8

The XA30.8 will totally have enough power to perform to your stated goals and then some. I used an XA30.5 on my Dynaudio Contour 60’s and was absolutely floored by how awesome it sounded; Drove them to perceived distortion free levels beyond which I normally listen, The XA30.8 has almost 6dB of headroom and is more like a 100 wpc into 8 / 200 wpc into 4 ohm. Pass rates the amps very conservatively; The first 30 wpc are in class A, the rest of the delivery in super clean AB mode.
( which is ~10 dB avg louder than your specs)...I was not expecting this result. Room is larger and wall to wall carpet and such.
As for comparison to Bryston: should be a noticeable improvement in resolution, front to back depth ("holographic"), much more refined treble, richer harmonic content across the board. More transparent and "live" feel; For a time I had a 4B3 with Dyn Contour S5.4 (Pass XP10 pre);
Go for it!

I'm not sure how much help this will be but I drove my Vandersteen 3A Sigs (87 dBL) in a room about your size with my Aleph 3 and found it did not have enough power for me.  The 30.8 may be different but the Aleph 3 is also a 30W amp and the speakers are close in sensitivity.

When I used this combo in a smaller room it worked well. Once I moved to the larger room it didn't.

Thanks Dpac996. Your response is certainly is encouraging and i am almost ready to pull the trigger.