OP, did you ever find a monitor that could run 120Hz+ through HDMI 2.0?
I am in the same boat, but for different reasons. Don't want to threadjack here, so the details of my situation are here for those interested: https://insider.razerzone.com/index.php?threads/120hz-refresh-through-hdmi-2-0-scientist-here-please-help.24919/#post-366122
Thanks in advance!