Bob,I'm no master,lol...but I do think that the sound of electronica in the bass is not the way to determine the quality of the bass reproduction.That's an excellent question Frank, and one that I'm also interested to learn from the masters.
Instead, I would nominate a good upright acoustic bass ( as played in a lot of traditional jazz) and the sound of the bass drum and even more so...the kettle drum. Hall ambience can also be a determinant. As to a recommended recording, that's a little tough, as I have not truly heard any totally realistic system in this regard. Could this be because there are so very few truly realistic recordings of the sound of real bass? (As referenced to in my OP) Perhaps?