I run a Thermaltake X71. It's really ugly, but don't care. I can pretty much do anything and will never run out of space regardless of how much shit I toss in it. I doubt I'll ever need a new case unless standards for mobo mounts change. Airflow through the case is great. 4 200mm, 5 140mm, a 280mm AIO rad and a 120mm AIO rad for the GPU mounted externally on the rear of the case. GPU temp, regardless of what I play or ambient temp, never pass 65C. I've also never had the 2080ti's blower fan kick in since installing it. CPU temps sit betwen 35C-40C and max out around 50C where the fans ramp up.
In the Fractal case it replaced everything ran 15-20C hotter and the GPU fan would need to run to keep GPU temps under 85C.
Since I took these shots I've added caster wheels to the bottom so it rolls now, cleaned up the wiring, added more ram and added 3 more 140mm fans to the bottom front side panel which has pressurized the case so I haven't had to blow out the dust in a year. Also built a new mount for the external AIO so it sits flat against the rear of the case working as an exhaust for the area below the GPU which dropped the GPU temps another few degrees.
I've been happy with the performance from the AIO coolers I'm running but when the 30 series vendor cards drop, unless I go with another AIO card like the Sea Hawk X I'm currently running, I might opt to build a custom loop. I've wanted to get into that aspect of building.