You really should try at least one. Dark Side of the Moon, is an excellent first choice because of the 'spacy' music and if nothing else, the added sound effects traveling around your room will demonstrate the difference of multi-channel music to even a person of little to no audio interest.

That's been my only experience so far and I don't plan on buying a lot more. Maybe a classical selection or two to see how it enhances the orchestra experience.

With great power comes Awesome irresponsibility.