I personally believe it depends on what type of overclocking you intend to do. For a more moderate overclock there are several good coolers out there that will do the job. If you want to do serious high overclocks you better pick your cooler carefully. It also depends on what CPU you are overclocking. My experience is with the 2500K and the 2600K. It ultimately gets down to how many volts you put to the CPU. I have an H100 with 4 Noctua fans in push / pull. I run all 4 fans at 100% all the time and they are dead silent. I have had no issues that you speak of such as pump noise and water leaks. my pump runs at 22-2300 RPMs all the time. But, for cooling it just does not do the job for me. When I run Intel burn test at around 1.38V temps get to 80C, which I don't believe they should. I also have a Noctua NH-D14. Before I damaged a few parts of it ( I'm a dummy) I have run over 1.4V and never seen 80C. When my new parts arrive I am sure that at some point, the Noc will go back on. However, I am only talking about benchmark tests. On normal use, even gaming the H 100 does well. At the same voltage I mentioned above, I can game for hours with a max temp of 55. So to me, it all depends on what you want to do. If you are going to do just moderate overclocks the 212+. Evo a zalman or the H100 and several others would do well for you. IMHO, if you are like me and like to 'play in bios' and push the limits on air, you should look for something like th NH-D14 or the Silver Arrow or maybe the phantaks. If none of those 3 will keep it cool, you will have to go full water. that has been my experience anyway. Another consideration is your ambient temps. I live in Florida where it gets quite warm. If you are in a much cooler climate, your experience will be much different than mine. I have a friend who has basically the same rig as me, but lives in the UK. His Thermaltake Frio does outstanding for him. But, he was running his in a much cooler climate than me. just my opinion.