I used to use my Razer AC-1 soundcard, but after switching to the onboard a week ago just to hear the difference, I can only conclude that the onboard chip is better by a great margin. What made me wonder was a review I saw of the PC360's on youtube where the reviewer basically said "don't bother buying them if you have a low end soundcard". So can I expect even better sound with a soundblaster card? And which one should I get in that case? I don't use speakers, but I have Sennheiser PC350s. Rock on!