Hey GCZZI
I have the almost the same configuration. Except I have 2 x MSI 980ti for SLI in windows games, and "only" 32gb of Corsair ram.
I had problems with the m.2 NVMe SSDs as well. Post #173 should fix it for you. I have the Samsung 961 polaris NVMe SSDs.
Hope that helps. I use the 512gb for macOS and 256gb for Windows. The 512gb has the clover EFI boot partition.
The i7 is not a problem. My SMBIOS still says Mac Pro 6,1 but it works fine.
I ran into issues with the ALC1150 install, read back a few pages. Get the KextUtility (google for it), it repairs the permissions which some time causes problems. I also logged in as the root user, which you can setup once you have for Sierra install working.
Bluetooth was not an issue, I used use a cheap dongle from eBay (
http://www.ebay.co.uk/itm/282181917088) plug and play.
I also used installed clover on my HDD and used this to get a running install, and once I could access the SSDs re-installed from the beginning. As I made progress I copy the changes to the SSD and try the next stages on the HDD.
Good luck. I'm very please with my hackintosh now.
Regards