I like the car non-boosted. I just left my torque pig 335xi for an M3. I like the M3 better, it is alive whereas the boosted car has no emotion.
Plus the guys are right, a 12:1 compression car should not be boosted, you are just going to tear it to pieces. On top of that you gonna need 100 octane fuel.
GL but I sure would like to see someone here run it for a while. This is way different than doing a stroker. The reasons why the stroker costs so much is because it is done right.