I forgot the joys of dealing with a teenager "ewwww they (SE215's) look like hearing aids" so that's them out. Also the Momentum controls don't work on the Moto phones, so I'll be buggered if I'm dropping a ton on something with only half functionality. So E10C's it will probably be.
Can't recommend soundmagic enough, get written off by some snobs as a cheap brand and new kid on the block still, but they are amazing bang for buck, reminds me of Xiaomi's tech offerings.