[mpathic]

May I save you a lot of time? I've done the trial and error test fitting of many tire and wheel sizes. I'm not the sole authority on this, but its what I'm using and don't see anyone else here giving true first hand experience.
If I were you, I would go down to 17's, not up to 19's.
I already changed the front of my E86 MCoupe to 17x9.5 offset 34. Rear is 18x9.5 offset 22. Tires are 275/40x17 front, 275/40x18 rear. Continental Extreme Contact Sport.
This is as beefy as can be fit without wheel well rolling.
You will save money on wheels, tires, and help avoid damaged vertebrae by staying away from 19's. 17's soak up much more NVH than 18's at the same diameter. 275/40 vs 275/35.
IF you don't need that much beef to keep the car planted, then 245 or 255/45x17 on 17x9" wheels will do you very nicely. Go with the 17x9 Kosei or TSR like Tire Rack sells, or DForceLTW from **********s.
Your car has the same wheel wells as the M, so if it fits an M, it fits a non-M.
F camber -2.0. This is with the upper strut mount pins removed to allow the upper mount to be all the way inward on the stud slots.
R camber -1.7.
Do definitely replace your FCABs with the offset hole MZ4 FCABs.
While in there, swap in a set of M swaybars. Instantly noticeable how much flatter the car corners.
IF you look at the used wheel market, there are a tone of cheap very nice looking 19's <fs> because people can't stand how jouncy the ride is, and sicko sticker shock for the price of 19's vs 17 or 17 inch tires. Many M3&4 drivers on cars that came with 19's switch back to 18's.
hth, Barry