I don't remember what SB it was since we're talking of six or five years ago, but it wasn't high end. In any case, I'm never going back to a sound card no matter how good they sound since an external dac is always going to sound better and, most importantly, it's fixed inside the PC. You can take the dac to a couch, nightstand or wherever.

For a multiple channel speakers system used with the PC only then yes, a sound card is definitely more practical.

Edit: I just googled the G6 and saw it's a dac, I assumed it was a sound card, which is what I meant in my first comment.