Well said. YMMV. We each live in different environments with varying qualities of power, listening rooms, ancillary equipment and of course, there is the matter of personal preference and so our differing choices probably reflects how we each choose to compensate for the shortcomings in our systems. With regard to settings on the DAVE, like you, I value the ability to switch polarity and I do it often. Unlike you, Crossfeed 3 is quite apparent compared to 0 and I greatly prefer it in all instances and so I never touch this setting.