Hi Rich (and Sfar).
Everyone's experience is different I guess. The Bereford is good and versatile, but the Benchmark, in my system offered greater detail and resolution, improved dynamics, and better soundstaging. It also sounds fuller. The Beresford gave me the impression of listening to a compressed audio format. I understand you can get the Beresford with upgraded op-amps. My sense is that the pre-amps in the Benchmark are a definite step up from the stock Beresford amps. The Benchmark also has balanced outputs, which are important for me.