Anthem or Bryston Pre and Amp

I live in Canada (Ontario, where Bryston is located) and there is a rather large following here. I was at one time but no longer. Good product. Reliable and good value for the money but it is mid-fi gear at best. Good all around, great at nothing no matter which model. Build is acceptable. For example you mention the 4B. Please take a look at the transformer size and capacitance, At 300W 8ohm I would want much, much more internal goodies. I bought the Pass Labs X350.5 and with a 1.5KVa transformer and 0.15 Farad of capacitance will utterly blow a 4B in any version away

I would take the Anthem because of the ARC room correction. If you want an integrated amp the Mcintosh MA352 has a tube preamp section and a solid state amp and is around $4500:

https://www.mcintoshlabs.com/products/integrated-amplifiers/MA352

I have owned a lot of Bryston gear, including the BP20 preamp. I would take the incredibly transparent Benchmark LA4 preamp any day over the BP20. I think it may be cheaper too. I would use the LA4 with any priced gear but would never consider that with the BP20.

I am now using the LA4 with a CODA #16 amp and it is killer. Today, I upgraded my WyWire Platinum speaker cable to the WyWire Diamond and the LA4 will let you hear the difference easily.

Edit: Oops, I see you asked about the BR20. I never heard that one. I will leave this post up in case it is useful.

Thank you for the recommendations.  After way too many hours of research I am now leaning towards the STR preamp and a Coda 8.  The STR preamp will give the room correction with bass management and I like the warranty and class A at lower wattage on the Coda.  Please let me know if you have any experience or opinions with this setup or the Coda?