I'm coming from an E90 335i LCI (N54 Twin Turbo). After driving my parents F30 328i I knew that the N20 delivered plenty of power for my needs. You can get into trouble with the 35i (goes from 60-100 MPH effortlessly!). We are expecting our 1st child and I am almost 40 so it's time to grow up (sold the 335i already).
I ordered the xDrive 28i M Sport. Wife loved the hydraulic steering (she drives a 128i) without servotronic. I like the M Sport wheels better than the other lines (actually prefer the 18s). Performance Control, sports suspension, and M steering wheel sealed the deal on M-Sport package for me.