Few interesting points here.I have one of these in my pc at the moment. I previously had a creative xfi xtreme audio. I wasn't disapointed with the creative, it was basically all I knew and working on that criteria I was impressed with it for most of the time. When I installed the xonar I expected a massive leap in sound quality, which didn't happen, I have to say I was initally somewhat disapointed, but ultimately the disapointment disolved, I found myself listening to the music, and not listening to the soundcard after a while, the matter was forgotten by and large. Some months later I had reason to install the creative into another pc and decided to 'hook' it up to one of the inputs on my amp, the same amp the asus uses, just a different input, the idea being to have a listen and comparison to the asus. This was the biggest of revelations, the sound quality really is awful compared to the asus, and I arent knocking the creative, it was half the price of the asus. The object lesson here being, that sometimes its not when you 'add' something to a system that you get the real benefits, over time the gradual improvements are almost just accepted and subtle as they are, they arent noticed. It's when you take that step 'backwards' that you really notice what the differences are. Creative cards are great value,but thats all they are,they have absolutely nothing to offer to serious music listeners.In the world of quality audio equipment 'Sound' is subjective, we all know that, I have heard systems costing ridiculous amounts of money and I havent been at all impressed, conversely I have heard budget equipment which has really quite surprised me, the price of audio equipment doesnt always reflect just what you get for your money and certainly a £500 amplifier never sounds twice as good as a £250 amp, its that law of diminishing returns that comes into play for some of the time. Soundcards break this rule to an extent, you tend to get what you pay for , by and large, not always, but I think anybody who knows about decent sound will know what I mean.