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Read ALOT about the Premium Sound, after all the research, I would say taht you are getting $1900 worth of technology and equipment. The DIRAC is only on the M5/M6 and you get 6 more speakers. Better amps, better speakers, eq... and the 4 year warranty not to mention the stock look. I would say, if you EVER plan to upgrade, just buy the Premium. If you've never upgraded your audio before, definitely don't bother.
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