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what worried me was that it is not possible to turn off their special emulated surround sound when listening to music >>
You sure can my friend. If you have it set in 4 speaker mode 2 channel streams are upmixed. If you have it set in 5.1 speaker mdoe, 2 and 4 channel streams are upmixed. If you want standard flat stereo flip open the control panel and set it to 2 speaker mode and it shuts off QMSS.
Another note on QMSS, if you are in 4 speaker mode playing a 4 channel source (most games) QMSS does nothing. So you don't have to worry about it mucking up your sound, it only does anything if you are in a "higher" speaker mode than the number of channels in the sound source.
I would take the AE myself over any other soundcard out there right now. Full EAX support for games, A3D 1.0 (no 2.0, only creative is allowed to use that, but even they don't bother)...excellent sound quality, all kinds of cool options around QMSS (for example DVDs that only have a stereo sound channel - yes there are some - and I don't have a Dolby ProLogic capable setup, so QMSS would work quite a bit like ProLogic in this case...very handy) and if you don't want it, set 2 speaker for stereo sources, and 4 speaker for quadraphonic sources and QMSS does nothing

It's a very versatile soundcard with execellent sound quality.
(The above information is gathered from reading several reviews, constantly pestering people at the
www.3dss.com message boards, as well as hearing my friend's, and in my view it's a cut above the SBLive! for sound quality, thought he and I have different speakers so it's not a 100% fair comparsion).