@hleeid,
The Bryston BP-26 preamp is what I have. I do not have an installed phono stage for it. I recently purchased the Bryston "1/3 chassis" BP2-MM moving magnet phono stage and have it tied in to my Bryston BPS-2 external power supply via a "y-connector". I was having hum from my Linn Sondek LP12 turntable until I found out that they didn't provide the Y connector which allows it to be noise free with the BP-26's external power supply.
As for the fidelity of the BP-26, I would say it represents solid state gear at its finest. Very low noise, excellent detail retrieval, excellent dynamics, etc... very transparent which foretells its ability to guide you on how to optimize the rest of your system (if this makes any sense). With the Bryston MM phono stage I am now experiencing resolution and sound quality with my vinyl collection that I never quite got to back in the day when I used to collect ECM jazz and prog rock and jazz fusion records. I chose to stick with moving magnet as a bit of a cost saving option since my phono stage retailed for $1,000 USD instead of $1800. My revamped Linn Sondek LP12 sounds better than I could have imagined and I now see how analog can be more delicate and musical than even very good digital.