Here's my WC setup. It's built for silence, not maximum OC.
Silent computing from Sweden:
Pump mounting frame with dual layer mechanical insulation. This very effectively removes esentially all vibration from the pump.
CPU water block:
System as seen from the other side, with airflow description:
HDD mounting frame:
Radiator/fan unit. The HDD frame sits directly underneath so that air drawn into the radiator passes the HDD first.