All things to consider. I have had this case before, the reason I am giving input is I have tried to use the LCS system that came with it. The "Whole" system is not that great. The reason the reviews show it on the lesser of the scale is because you are pitting a 500L pump against better pumps. Stock fans VS better static pressure fans. A very, very basic radiator design vs better copper fined and FPI models.
Consider things like this.
-Fans and static pressure.
-Radiator FPI and relation to Fan CFM/Pressure and speed for noise. Also core type and flow rating.
-Pump Speed and Head Pressure.
-Location and Airflow.
I am not telling you are wrong and not going to see a difference. But to justify the 60 bucks on just a radiator on the same exact loop will not do justice. Maybe some higher CFM fans with a better radiator. When is the last time you cleaned your loop?