I use the QC15s for flying, but one IEM which has worked well for me on planes is the Klipsch X10. It's a little more expensive now (I bought them for $85 around Black Friday last), but they isolate plane noise really well for me with the dual flanges. It's probably the small size and the deep insertion. The bass also rumbles nicely, drowning out additional noise.
I'd only pick it up if you like a warm sounding headphone. For a single BA, the X10's bass is pretty strong - quite punchy and well-defined, more like a dynamic driver. I haven't heard any of the Ety line, but from what I've read the X10's sound signature would be totally different. I used them on my last flight (14 hours... yuck) and they worked a treat.
Good luck with that!