<< What kind of speakers do you have? Excellent Hearing medeocre speakers maybe? The Audigy has a nice increase in sound quality, but your speakers might be the limiting factor. >>
My 4 speakers are Infinity reference, my center is an infinity entracenter, my sub is a 400watt pinnacle. My receiver that this is all connected to is an Onkyo TX-DS696. Pretty decent stuff I think. For headphone I use a set of denons HD-750 I think. I never said I couldnt hear any difference, I just dont hear a substancial difference. Its a good card but I went from the Sound blaster 5.1 platinum to the audigy, it wasnt as big a diffrence as I expected like say, going from an SBPro to a live platinum.