I have the same case, and my ambient temp is bellow 25°C aswell.
Already tested many things in this case, so i can save you some time.
Best fan config. for performance/noise is 3 intake and no exhausts (a rear fan can be beneficial at very high loads but even then, the temp drop is about 2-4°C (depends on your maximum temps)). The case only supports officially 3x120 in the front. I have 2x140+1x120mm (the 120mm is on the low side of the front and zip tied).
Don't run excessively high the mid fan, it will have an impact on the CPU, but it will behave weird on the GPU. On one side you force more air, to the GPU, and on the other hand you force it to recycle heated air.
Remove the pci-e brackets from the back of the case, tuck the cables behind the mobo the best you can don't leave them down, and remove the top of the PSU shroud. I have removed the drive cage aswell.
Don't mount anything on the 2.5" slots behind the socket. They will unnecessarily get 15-20°C temp increase.
I'm using the bottom for for installing the storage. There's no official support for it, but all the bottom is perforated, so it's pretty easy to mount 2 drives there. It's the best option for the case airflow and for the storage temps.
I would get the le grand macho RT since it's a perfect match for the case ( I'll probably get it, when I'll do a CPU upgrade) and if you go for 3x120 in the front, just add another f12. If you wanna copy my front setup, don't get nf a14's. Get sw3. (had both of them)
Last edited by Shenhua; 07-01-2019 at 11:59 AM.