How about:

Water cooling can never be quieter than air? I have a system here that kills that myth dead.

Water cooling can not be economical. While it is certainly more expensive than stock air cooling, it can be, when longevity of a carefully planned and constructed loop is taken into account, be nearly equal to top-performance air-coolers.

When considering cooling alternatives, Watercooling's risk of leakage and potential total-system destruction must be taken into account. Seriously. This one's still alive.