I wouldn't go on what one reviewer says about the Bryston's "sibilance". They are incredible amplifiers and if you go with one, will bring you years and years of world class performance. I would like to know if he level matched the amps when listening to them, and A/B'd them at the same time, not relying on poor sonic memory!
I'm not sure what your speakers demand power-wise, but IMO the 3B might be overkill. If you want an amp that you can upgrade speakers with, and want to keep it for 20 or more years then go for it. I'm thinking of getting a 2B or McIntosh power amp and building around it as technologies change - swap out Preamp, D/A's and sources over time, and let the Bryston be the constant foundation. The nice thing about Bryston, is the ability to send the amp back to the factory if need be. All amps definitely do not age well, but it's always really nice to know that you can get the product up to spec (20 year warranty is nice.). McIntosh doesn't have Bryston's warranty, but again, you can send any amp back to the factory and they'll bring it up to spec for you. I had a Mac before, and the nice thing is their value increases over the years!