Very cool find, I was similarly lucky a month ago when I happened upon an '11 E91 M-sport/6mt in Space Grey with 9k miles. Didn't think twice about dumping my '10 335i xDrive (auto) for it. Love that yours has nav/iDrive, mine doesn't and I miss that feature as I had it on the 335.
Love the touring though, got some 18" black O.Z. Ultraleggeras for my winter wheel/tire setup, I'm using Dunlop Winter Sport 4Ds. Love the shorter shift lever on the M-sport cars, I thought I'd be missing the 70 bhp that I left at the dealership, but with the manual I honestly don't miss the extra hp, and the E91 with the manual is a more engaging than the 335i with an auto.