Heh, I didn't mean to hijack the SP3 thread, sorry for that.
To me what is desirable is a surround sound DAC, separate from the source and separate from the pre-amp. Perhaps if the SP3 chassis was split into 3 parts: power supply, analog, and video(hdmi) that would accomplish my wishes and would be an easy sell to add the BDA-1. Potentially it would make it easier to swap out the video section down the road if this became a trend. It's taken a good five years before blu-ray players even decoded the hi-rez audio before shipping it out on the analog ports, before they would downgrade it or not offer it at all.