Nzxt 120 RGB Duo :) but are actually expensive

I have installed the Lian-Li UNI FAN SL-INF 120. They come in a set of 3 and fit without any problems. I have 3 at the bottom, 3 on the side and 3 at the top as well as a rear fan. The advantage is that you don't have a separate cable for each fan and therefore don't have such a tangle of cables.

Hello corsaire LL 120 goes down very well, for example

Nzxt 120 RGB Duo