I have a 125i. auto. Happy chappy.
Bit of history:
I was initially looking at a Z4 Coupe. The issue with the coupe, is you fall in, not as much as getting in. Great car if its a 2nd car and they hold value. get a manual. sports seats. the dream would be an M-coupe.
I wanted to use the Z4 as a daily, but after a test drive, i said no.
I needed a car that if my folks wanted to use, get in and go, and needed some level of practicality.
the 125 i got was by luck. guy was moving to holland, i wasn't really keen, but it had all the specs i wanted and the engine.
i am happy with the auto, it could be a bit faster to gear up or down but its still a good box. i have the steptronnic paddles, and i kinder enjoy that you can use one hand to change up or down.
also, i have done the bimmerlabs tune, which was free to download, and now my car has the 130i tune. i am planning to update the gearbox to the 130i auto file when i have time.