So the reason for my hesitation with mounting the ACS style bumper was due to air flow to the radiator.
As you can see, the OEM bumper and M3 rep there is plenty of room for the air to get through and cool the radiator, but for some reason ACS decided to have that middle part blocked in their design. I am also not sure if my rad fan is even turning on at this point. But at the same time the time the rad fan is effective is at stand still or below 20mph or something so that wouldn't have anything to do with the bumper. The bumper style would only effect cooling at normal driving speeds, so I am giving it a go. I don't think it will be a problem, but its just something that I thought of.