@maguiar, I bought the 3BST and 4BST, running them with Magnepans and Martin-Logan hybrid ESL’s. They were clean and clear and easy to listen to. A little laid back - involving but not fatiguing. An amp to use and keep rather than an amp to wow and trade.
I once shorted out the outputs while under load by moving them against a bare aluminum chassis. Massive fireworks, as in arc welding, which is what I was unintentionally doing. The Bryston shut down, cooled down, and then worked fine.
They (Brystons) lacked the extreme clarity and focus of my Atmosphere amps, but they (Brystons) didn’t have issues, ever, and didn’t need adjustment, ever, and didn’t need tubes. I would still have them if I didn’t DIY my electronics these days.