ANd lets not forget to mention that the Sound Blaster Live has 4 channels, and the 5.1, well, has an extra center channel and a sub channel.... so if you'Re going for the full DVD AC-3 experiance, the 5.1 would be the choice to make... but if you don'T care for the 5.1 audio, and you'Re fine with 4 channels, then get the regular Platinum.