System has been up and running for a couple of days. And thank you to everyone for your input, advice and support. I was nervous about implementing the changes (thought I would break something). However, things are looking well. There are a few hiccups, but overall things are working well:
Using latest NvidiaGraphicsFixup.kext and Lilu.kext
SYMBIOS: iMac 17,1
Nvidia 1060 6gb
i7 6700
Gigabyte z170X-UD3
Nvidia Driver version: 387.10.10.10.25.61 (says Up to date)
CUDA Driver version: 387.178
(I've attached my config.plist and "Other" kexts folder
FCPX seems to be running pretty well. Other videos look great.
The few issues I have are during boot up or wake from sleep, the screen flashes several times (in 5 second intervals ) for about 20-30 seconds before I'm able to enter my login info. And once in a while, my wireless kb and Magic Mouse aren't able to be connected. So I have to use a wired one, and re-pair the BT mouse and kb. Other than that though, things are running very well.
I've seen a few bench mark tests I'd like to try as well. Any recommendations? (I'm not able to find that water test or know what test to use for Google Chrome).
Thanks again...
Rodney