Liquid coolers don't leak anymore than air coolers break motherboards. It happens, but it's rare enough to not really be an issue. The only real difference between air coolers and aios is the price tag. Very few push a system hard enough to take advantage of an aios greater capacity for heat exchange.. As far as ability goes, a H60 is equivalent to a hyper212, h90 a D14, h105 a D15. Etc. The rate of exchange is equal roughly, it's only on the largest 280mm coolers that there's no real air equivalent in capacity. I prefer aios, but that's me, there's no need for liquid for OC, air works just as good.