yes it will fit... but what I'd reccomend is removing the top rear exhaust, and installing the water 3.0 as intake there. so it's pulling in fresh air from outside the case for the radiator.. then it's going immediately out the top of the case.
That's how I always setup 120mm water units.. works great.
just get a magnetic dust filter for the outside back of the case for $10 and clean it every few weeks