Your case is not a good one for airflow.
Only one 120mm front intake fan.
Adding a bottom intake fan would help, but then, there is no way to filter your air intake to keep your parts clean.
I would look for a case with two front 120mm intakes or better.
All of the above does not matter if you already own the case.
But, the fan capability will have a direct impact on how you do air or liquid cooling.
There is some merit in installing a 240mm radiator on top, taking in air,
Really though, I see a nice noctua NH-U14s as a perfectly adequate cooler.
It will be cheaper, quieter, and cool equally well.
My canned rant on liquid cooling:
------------------------start of rant-------------------
You buy a liquid cooler to be able to extract an extra multiplier or two out of your OC.
How much do you really need?
I do not much like all in one liquid coolers when a good air cooler like a Noctua or phanteks can do the job just as well.
A liquid cooler will be expensive, noisy, less reliable, and will not cool any better
in a well ventilated case.
Liquid cooling is really air cooling, it just puts the heat exchange in a different place.
The orientation of the radiator will cause a problem.
If you orient it to take in cool air from the outside, you will cool the cpu better, but the hot air then circulates inside the case heating up the graphics card and motherboard.
If you orient it to exhaust(which I think is better) , then your cpu cooling will be less effective because it uses pre heated case air.
And... I have read too many tales of woe when a liquid cooler leaks.
google "H100 leak"
I would support an AIO cooler only in a space restricted case.
-----------------------end of rant--------------------------
Your pc will be quieter, more reliable, and will be cooled equally well with a decent air cooler.