I'd like to know how a 220 stack with 6x ~1900 RPM fans would do against a single 220 with 4 of the same fans and a single 360 with 3 or 6 fans. I need to either get a 220 stack (I'd have 4x or 6x 1900 RPM fans) or add a 120 rad to the loop that already has an RX240 with 4x 1900 Kama Flex fans.