I came across this link while searching on something completely unrelated and thought it was a good read... Although annoying since the site uses white text on a black background.... which, if it bugs you, just highlight the entire page and read normally.
Here it is:
http://www.std.com.tr/bilgi/analog_vs_digital.htmIt's sort of an ad for Apogee but, I thought a lot of the info in it was factual and the analogies were fantastic.