There's one really bad tip thrown for a couple of times.
Do get a soundcard. Integrated ones have improved much, but if you listen to music and otherwise enjoy a proper sound quality. It's so common to stare at the "7.1" and "HD Audio" tags on the integrated ones, while the difference to proper peripheral ones can be quite massive. If you haven't got, nor ever tried a PC with a proper sound card and a pair of quality headphones, nor care about sound quality; don't throw bad advices on the subject.
I'm more on the side of Creative X-Fi, but what I've heard and read, ASUS Xonar is nearly or just as good.
Pay in mind though, that you'll need a quality pair of headphones/headset/earphones to get the value out of the sound card. That can run you about 100 ?, or more, or a bit less, depending on your tastes, ear size, whether you like closed/open and so on. It's a whole another subject though, because while price can be a good marker for quality (especially within the same manufacturer), it's not as black & white as that. And personal preferences play a big role.