We have very similar boards / configurations. I looked through your config and I don't see anything obvious that may cause an issue. In fact, the only real differences we have are that I have Lapickernelpanic set to false / bootprotect set to none and yours are true, etc. Besides that I am using iMacPro1,1 for an SMBIOS vs iMac19,1 but that's only because of DRM. I didn't have problems with sleep/wake with either. Since you upgraded from a Clover installation, there's at least a possibility that something isn't compatible or there are leftovers somewhere, etc. You might consider a fresh install, or perhaps double check with kextstat that you have the most current versions of the kexts you need loaded. On that note, you don't seem to be excluding the airport460 kext and you should be, either by limiting it vs the the kernel or deleting it altogether. Probably not the sleep problem, but again, a mistake in your installation. Aside from all that, I'd start looking at your bios configuration to see if something is wonky there.
