drnoodle:
The MacBook solution is to get a clean DMG image. After that you can use the DMG to save time (restoring on the other disk you are going to install and test in).
Both of you, have you tried to boot with "-x" to repair permissions, and after that try again without "-x"?
Which Bios version are you using?
My Bios options are the optimal, even i have VT-D enabled. The only things i changed are related with boot options (boot from Marvel Raid, Ethernet... that slows boot).
I don´t remember if GTX670 works with GraphicsEnabler=Yes or No, but maybe your issue is the graphics card, i mean, if you can get IOBluetooth message i think you are already at system, but you can´t see anything (i don´t know it 100%).