For what it's worth, I also have a GA-Z9X-UD5H build with the i7 processor (GTX760 Graphics card), and I couldn't get past the spinning beach ball until I deleted all folders in EFI/clover/kexts except EFI/clover/kexts/other and put FAKESMC into the 'other' folder.
However, once I managed to install El Capitan, I had a whole headache of multiple troubles, including inability to get audio working, random app crashes, and overall instability. I gave up and went back to my fully functional Yosemite system.
Thankfully, I had everything backed up, so it wasn't a huge pain, but I still wish I knew exactly what I'd done wrong. I suspect I had a few incompatible kexts hanging out in S/L/E but I haven't had time to troubleshoot.