your case will fit the dh 14 and 15.
gamers nexus did a aio cooler round up and threw in the noctua nh u14s tr4 (normal dh 14 modified for thread ripper with a thread ripper sized plate and mounting).
in their testing the noctua outperformed all the 120 mm and most the 240mm coolers, and a couple 360mms. different cases effect air flow differently, but worst “case” for air vrs best case for for aio is onyl going to be a couple of degrees difference.
if you arent going for extreme overclocking and doing voltage mods, i wouldnt worry about it. the 3600x doesnt get all that hot compared to thread ripper and almost every aio will adequately cool a thread ripper.
point is cooling wise you are very very safe with either noctua or a aio. noise levels are in the video. biggest concern should probably be price and whether you want to go with a more simple cooling solution (air) or dont mind swapping liquid in 5 years and risking water damage. some of the aio companys like corsair have warrentys on the aio that cover the entire system in case of leak.
theres really no bad option just a lot of good options here, the 3600x is super low heat.