The last question, i promise... what is the best way of controlling the 3x PWM fans on the CPU rad and the 3x PWM fans on the GPU rad, i was thinking of putting the 3 CPU fans on the CPU header and the pump on the CPU optional header, not sure if this is the best method, where should the GPU rad fans go, would it not be better purchasing something where everything connects up in one place
We would need to know what motherboard you have, and the fans you intend to use. Some motherboards claim to have pwm control over the fan headers, but actually they are voltage control. PWM fans often have problems being connected to voltage control fan headers.
Akasa does a fan splitter, but I think it only connects 5 fans for pwm control.

