Let me throw in McIntosh, which many like paired with B&W. I drive my 804S with a McIntosh MC275 tubed amp. There is an integrated McIntosh amp called 2275 which is essentially the same amplification section. While not solid state, try and give it a listen. My amp replaced a 200 Wpc SS amp. Tubes and B&W aluminum tweeters work well together. There are also SS McIntosh integrated amps too, who some prefer to tubes.
I hope it helps.
Horacio
I hope it helps.
Horacio