I regret not getting the upgraded audio on the M3. Had the Logic 7 on my 335i and loved it. The M sounds like crap in comparison.

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2013 Cayenne S
2010 G37x
2011.5 ///M3 Sedan (ED 3/18/11) (SOLD)
2008 335i Sedan (SOLD)
2007 GTI (SOLD)
2006 RSX (SOLD)
1995 Civic (SOLD)
1994 Jetta RIP