I like the mature and experienced advice on this site, and the tolerance of the contributors who recognize that one size does not fit all (and the patience with those of us who have little experience). I am going to take the advice before buying a receiver of visiting several dealers and listening to different receivers. My question is, what DVDs (or CDs) do you like to use to test the performance of a home theater system, and what do you listen for? Are there specific sounds on the track that are particularly revealing? I recognize this is probably a matter of personal taste, but I don't want to limit the responses from contributors by giving my own preferences. I want to make sure my source material is produced with quality and truly tests the receiver and system before trying it on different systems. I'll go pick up a DVD and CD based on comments. Thanks everyone.