Agreed with pretty much all of the above.
If you have the coin the Akra is the way to go. If you're worried about audible levels then you can mix and match with an x-pipe. That will cure the itch
IMO, I'm still having a hard time justifying 6k for a full exhaust system
I heard the Vanguard and it sounds pretty legit!
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PAST 2007 Black Sapphire E90 335i, 2010 Jerez Black E92 M3, 2012 Mineral White E92 M3, 2013 Singapore Grey F10 M5, 2016 Azurite Black F80 M3,
CURRENT 2017 Oxford White GT350