It was one of the first AIOs that I witnessed firsthand, and I saw several forum threads with similar experiences from other users around the same time. They may be better now, but I'd still lean toward air cooling over water cooling as being safer.
If these fans end up being replaced, I only have one set of brackets and I would like to continue with the two fan setup. Based on your suggestion, I am leaning toward Amazon.com: Noctua L-Type Premium Quiet CPU Cooler_ Retail Cooling NH-L9x65: Electronics which has high reviews including one 7700k user who said temps were 55 C at 100% load. It has the added bonus that it's a top down cooler, so less space issues, and it will probably do a better job of keeping the motherboard components around the CPU cooler.
