if ur an avid listener to the sounds made by ur movies and games, yes having a sound card will most definitely be beneficial if not just scrap it....(keeping in mind good speakers or headphones are first needed to be able to get great quality)

im also currently using one and well as far as any 2.1 goes IMHO hell yea its good imagine it the speaker bought 5 years ago is still in stock and the price has not just fallen but increase instead since i bought it. Which in itself shows how strong the goodwill the VS4121 model has been....

4.2Ghz OMG. That is awesome really hope i can try that on mine...