I think the Benchmark could sound lean with some sources, especially many digital sources. I think a better word for it is transparent. If your source is lean your sound will be as well. Even though the benchmark is extremely transparent, it does not mess up the music...it still sounds very musical.
I had forgotten about an ATC CA2 preamp I heard a few years ago. I was very impressed with the system sound (all ATC). I'm thinking it might rival the benchmark in transparency???
BTW, thank you for all your responses. I have eliminated Bryston from my list based on the reply's. Even though I know it I really good, It's not exactly what I'm looking for.