I used to have an AIO on my old 3570k, it permeated out, lost all thermal performance, blew the chip. (Besides you'd be surprised what a good air tower can do. A D15 (the one up from my U14) can easily match, if not beat a typical 240mm Closed Loop (H100i from Corsair for example). My 1600x at 1.435v 4ghz (yes I know I really lost the silicon lottery on my chip to need voltages that high, especially on a Taichi board), under AIDA-64, reaches maybe 65 degrees in a 24C ambient. That's full synthetic load. 55 on big Lightroom exports. Gaming; the fan doesn't even change RPM. Premier Pro, a bit more then gaming, since Cuda acceleration takes a huge load off the CPU.
I wouldn't recommend AIOs unless you are constrained by space, that being said now a days they are much better than they used to be, I will admit. But unless you get a 280mm or above, towers are cheaper, better, last longer. (when compared to 240mm and below). Even with my airflow focused case (MasterCase 5) I can't hear it with my open cans, and you can see how close it is. Mind you, I did spend the money on a 100% Noctua set up.
@Pharmaboy AIO: "All-In-One". A more appropriate name would be a "Close loop liquid cooler". Basically a plug and play water cooling set up for your components. Supposed to give you the advantages of a custom liquid cooler, but with out any hassle.