I'm going to complete the rest of the build and see where everything's at, but I'm leaning towards ordering one of the two air coolers. My curiosity is satisfied and Big Air is the way to go. Are the Noctua D14 SE2011 and LGA115x the same except for the mounting bracket? If they are, does anyone have a link (preferably Amazon) for the mounting bracket? I'm not sure if I'm looking at the right one.
As for the Phantek, it's a little cooler, better looking, but I'm not sure if the pipes will clear the daughterboard heatsink compared to the known of the Noctua. It's just that I want pwm fans and I don't want to have to pay to exchange already good noctua fans....
*edit. Here's the page of the Node owners thread showing the D14 fits, in case someone searches for D14 and Impact fit pics.