How many miles does your VC itself have on it? The CCV valve incorporated in the VC tends to fail sometime between 100-150K miles, and it's possible for the VC to warp which may mean it still leaks even with a new gasket. Therefore, you may want to consider a complete VC replacement at this time to save hassles in the not-to-distant future. There are cheaper AM VC's out there, but as usual... it seems the genuine BMW VC is the surest bet.

AM.

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E70 2010 3.0 M57 AT Titanium Silver with Black Leather
E53 2004 3.0 M54 AT Toledo Blue with Gray Leather
E83 2008 3.0 N52 AT Silver Gray Metallic with Black Vinyl
E46 1999 2.8 M52TU 5MT Black with Tan Leather 250K+ miles (Sold, but not forgotten)