Asus actually makes better sound cards than Creative, in fact Asus sound cards are some of the best consumer level models on the market. Creative sound cards are pretty junky at this point. They were pretty much the only major brand of sound cards for a period of time so they were the only choice; that reputation is the only thing that keeps them in business as their technology, design, and quality control has stagnated compared to other companies who have joined or rejoined the sound market.
Hell, the no frills $30 Turtle Beach sound card is better than what Creative puts out.
So what I'm saying is that you got ripped since there are much higher quality Asus sound cards for around the same price point that you payed. Your card will work of course, but if you're already paying $90 for something like that why not get the much better one?