A final observation. Yesterday, I listened for several hours (most of the day, actually) and compared a Benchmark DAC2, as an analog input, to the SP3 using a digital source (Squeezebox Touch). There really was no difference in the quality of the sound. The SP3 sounded just fine, compared to a $2,000 DAC. The SP3 is fantastic. The Benchmark is going back. Well done, Bryston.
I wonder if the BDA-2 would be a significant improvement on the SP3 two channel performance?