Take your pick:
Airflow fans - quiet operation but less airflow due to the restrictions (solid front panel)
SP fans - louder but better airflow
I personally, would go with high-end CFM/SP fans, e.g
Corsair ML Pro series or
Noctua industrial since to get the best possible airflow with the least amount of noise, install as many fans in your case as possible. Preferably 140mm rather than 120mm since 140mm fan moves more air and does that more quietly than it's (same spec) 120mm counterpart.
While installing 5x to 7x fans in your PC may look like that you'd get extremely loud noise out of your PC, it's actually vice-versa. The trick is that the more fans you have inside the case, the less each fan has to work to maintain the airflow and the less noise fans produce.
And that is also a main reason why i have 7x high-end case fans in my Skylake and Haswell builds. Mostly 140mm but few 120mm as well. Full specs with pics in my sig. Since i have that many case fans, i can keep all of my case fans spinning between 800 - 1100 RPM and thanks to this, my PCs are very quiet while still having proper airflow inside my full-tower ATX cases.
Oh, those CM Silencio fans are available in amazon.de as well, (€14 per fan),
pcpp:
https://de.pcpartpicker.com/product/ywzZxr/cooler-master-case-fan-r4sfnl14pkr1