Hard for me to say, as such products are not my forte. You'd see an improvement in load temps, especially as you up the volts, but I don't think it's worth it at all.
The H60's priced at around £60, which is the same area as the NH-D14. The 'D14, although an air cooler, it's far, far better. It keeps up with the H100, to give what I say some more weight.