Ah man, you shoulda went with the ACX cooler
I think those reference coolers end up running around 10C hotter.
On your monitor, I'd go for the higher resolution, higher game detail, better color reproduction, etc. over 120hz. After every thing I've researched, there's a lot of posts out there with people saying once they switched to 1440/1600p they can never go back to 1080. It's just that amazing looking.
Keep in mind also with running 120hz display, unless your GPU is pushing out a
constant 90-120fps in every game, then that 120hz monitor is a waste.
I don't know how true this is, but I've read online some people say that when their GPUs are only pushing 60fps on a 120hz monitor, then it looks like crap.
On the other hand, if you're interested in going multi monitor in the future, then you'll want to avoid 1440/1600p. Because like Kris said, even a couple Titans probably couldn't even run that properly.