So I've read from the pcpartpicker that it fits, but when I look into the case, how is it supposed to get the air out of the front panel? Only a little cutout in the bottom.. Or is it fine for the cooler, and I should not worry about it?
Typically you have front mounted radiators setup as intake, not exhaust. It would be pulling air through that slot.
Really not the best case for water cooling, or cooling in general. If you are willing to spend that much on an h100i, I suggest picking out a $30-40 case with some decent airflow.