Went from e90 n54 to f30 n55. Prior long time manual guy but switched to auto for these cars. To be honest I like the n55 better. Smoother power delivery and torque definitely comes on earlier. The 8at is an amazing transmission and perfectly matched to the engine. I don't feel that it is any less powerful and actually feels a little quicker in the lower rpm range.
2013 335i xDrive sedan, sport line, melbourne red/black/black trim/red accent, premium, cold weather, tech pkg, dhp, sport AT, PDC, rear cam, auto high beams
2009 335i xDrive sedan (gone, my first BMW)