If I can add one more thing, in my case an important parameter in the choice of a soundcard is the analog-to-digital recording quality...
I have some old LPs (in particular a lot of Hendrix bootlegs ) that are unavailable on CD, so for me it is really important to transfer them on CD with (almost) the best quality possible... If you just want to play sound, then probably the choice of the speakers is more relevant, provided that you have at least a decent soundcard... But if you want more, some brands like Terratec, M-Audio and others are excellent for D/A conversion.
It depends on your needs... but if you like music, the perspective of a very good audio capture of an old LP or cassette, together with the unlimited possibilities of audio editors available today, does not attract you?