I am also running the scorcher with the auto trans and msport RWD. it's excellent. no issues at all. super smooth in sport plus or comfort mode and really nice power.
I also have an e90 n55 and I think the tuned 328 feels as fast as that car when stock. (but I don't have that one stock
__________________
Koni sport shocks, BMW performance springs, M3 arms and sways front and rear, M3 subframe bushings, Velocity toe arms, M3 front strut bar, Cobb, ETS FMIC, Vishnu charge pipe, RPI scoops, M3 steering wheel, M3 carbon leather interior trim, Advan RS 18 inch wheels, Pilot sport tires