So I got my iPhone 6 Plus today, and I got this (
Kenu Airframe+ Car Mount for Phablets) last week, and they work perfectly together. Very snug fit, and there is still space under the nav screen for the phone without interfering too much with the climate controls. I'm very satisfied. Plus, the new, larger Airframe is more black the grey so it blends in much better with the vents when not in use, a definite plus.