Just received the M-Audio Revo 5.1 today and I am NOT impressed at all!! I didn't hear any difference over my old Soundblaster Live 5.1, it doesn't play as loud as the SB, soundstage and imaging didn't improve any, and the hissing noise at max volume is pretty much identical. If you have the Audigy line or older SB Live 5.1, keep them and do what DJ suggested....use the KX Project drivers and tweak the DSP map!! the KX has much noticeable and audible improvement over the crappy creative drivers. This M-Audio is going straight back to newegg!!