liquid metal does have its advantages. Thermal conductivity wise it beats water all over the place so it should be great for a storm block given that i think the main fluid heat transfer property is thermal conductivity, rather than prandlt number. However its viscosity makes jet impingment problematic as it prevents nice high speed jets. Also as it truns out it has roughly the same prandlt number as water so convective proformace is roughly as good although its perfromance level is at a much lower flow rate (before anyone goes ahh its better its performance increase per lpm is off set by its inability to be pumped fast).
For the moment water is a better as its cheap and has quite good heat transfer. Being organic has its problems but less so than having this super heavy toxic electrically conductive fluid.
If the cost problem could be solved to a resonable level by some materials bod with a chemistry set im not sure which is better. Cost can be kept down by using magnetic pumps and less fluid. The solid state nature of the pumps means that variable flow rate ie pulsing is a possibility. Since liquid metal is so dense it could use smaller radiators. Its convective performance is the same as water (same prandlt) but you could use jet impingment onto a plate (turn the side fo the case into a heatsink) to transfer heat to the air. Its a possibility but not for awhile as they still need to get the kinks out.
EDIT: my awful spelling
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