I realized my Noctua NH-14 won't fix in many standard ATX cases. Would getting a 140mm cooler be just as good? I don't OC anything.
If you aren't overclocking, getting a AIO or even a NH-D14 is just overkill on the cooling. Even a cheap Cryorig h7 or 212 evo would be sufficient enough in keeping that cpu cool.
If you are insistent on getting a 140mm aio, I recommend getting the NZXT Kraken x41. It'll perform better than the NH-D14.
I ordered the x61. I can mount it on the front as intake and then have 3 outakes on the top and 1 in the back for negative pressure.