IMHO you don't want equal in/equal out of the case but rather a slight amount of negative pressure inside the case, the exhaust fans should slightly over power the intake fans. In the lower front, up and across the motherboard, out the upper rear. My system is liquid cooled too and gets a little complicated because the PSU is bottom mounted so i have 1 120mm fan blowing out through the radiator at the top and 1 120mm blowing out through the PSU at the bottom, I mounted 1 120mm fan blowing out at top in the very back of the case above the radiator but then i only have 2 120mm fans blowing in at the front, even though the ratio is 3 - 2 because 2 of the exhaust fans are restricted by the radiator and the PSU it evened out nicely and get wonderful breeze through the case, goes in the front and splits in 2 directions over the motherboard, half goes up and out and half goes down and out.. Blow a little smoke in your case and watch it..