Of the preamps you mentioned in order
Copland 301, Bryston, and the Rogue.
The Copland while the oldest design is still an outstanding preamp which lends itself well to updating.
Bryston's are certainly not bright, but can be a little dry sounding, but work well with a lot of amps. The Rogue is very nice, but can be noisy and has a lot of gain.
Ignore the bull about the 12auh7 tube. It's the implementation that counts.
I would also be pleased to quote you on a build to give you what you want.
Copland 301, Bryston, and the Rogue.
The Copland while the oldest design is still an outstanding preamp which lends itself well to updating.
Bryston's are certainly not bright, but can be a little dry sounding, but work well with a lot of amps. The Rogue is very nice, but can be noisy and has a lot of gain.
Ignore the bull about the 12auh7 tube. It's the implementation that counts.
I would also be pleased to quote you on a build to give you what you want.