6 hours ago, narrdarr said:
3x140 would be better as they have more static pressure then 2x200
And you can make the size of your case smaller
Static wise and and 3 140mm will flow a lot more air, even if you had zero restrictions. Remember, even a fully perforated rear will cause some static.
Also, are you filtering your intake?
Two 200mm would probably be enough, especially if you aren't filtering.
If you have the time, make a cardboard mockup. If you are careful and don't damage anything, you can easily return the unused fans if you get them off of Amazon etc.