I already have an Hyper 212 EVO on my AMD FX-8350 and was going to use it with the i7-4790K, but I've read reports of people getting temps of 90C+ even with that cooler. Granted some (like you) don't, but I've read a few specific complaints and it really bothers me. Then this thread came along and it doesn't make comfortable reading.
I've had so many problems with my AMD system that I want to dump it forever, and I would like to replace the motherboard, CPU and RAM with the confidence that I won't have more battles to fight once I've got them. The i7-4790K appealed because of the similar clockspeed. Even though it's a much better chip than the FX-8350 for other reasons, it still feels somehow wrong to switch to a CPU with a lower turbo speed, but that's probably what I will end up doing.