is that it makes little sense to buy such a high end set of speakers and feed it with a baseline device such as an on board sound device. It would make about the same sense as spending hundreds for a premium sound card and run it through $20 speakers. The Klipsch audio line has been around plenty longer than PCs have and is well respected in audiophile circles. I am in agreement with you but even the card you linked to probably won't bring out the best in those speakers.
A friend wants to buy the Klipsch Promedia GMX 5.1 speakers, but he only has an onboard sound card. I found a cheap sound card that looks good enough for him, (he mostly listens to music) but I'm not sure if the sound card will be sufficent or even able to connect to the speakers because of a coaxial connection. Can anyone help me? Here is the soundcard. http://ecoustics.epinions.com/content_143396802180