I'm using the Geeek A60 with air cooler since the launch, it's defenitively the best ITX case I've had.
Specs on air:
Intel i9 9900K
Noctua NH L9x65
Asrock Phantom Z390 and (temporary) Asus Z390 Strix (Asrock on RMA, NIC died)
G.Skill Trident Z 16GB 4133mhz C17
Samsung 970 Evo 1TB
EVGA RTX...