CyberPowerPC has had some very unique computers for gamers in the past. The CyberPowerPC Gamerstorm Quadstellar is also interesting. It has a quad chamber design for better heat dissipation. Each chamber has room for fans to cool the components. You will be able to put multiple graphics cards in this case.
The CyberPowerPC Gamerstorm Quadstellar PC is ready for AIO liquid cooling. You can find it here.