I recently got a pair of Etymotic ER6i from Beach Audio (an Amazon third party vendor) for $100 which is a bit more than the target price. Im stunned at the sound quality.

Flew a roundtrip to London and am in Japan now after wearing them on the JFK-NRT flight. I wear the Etymotics in my ears and the Bose QC2s over them with the cord out on the QC2s but the noise reduction turned on. It is wonderfully isolated. Someone suggested I get a splitter and amplifier and power up both sets of speakers. I may try that if I have time to get to Electric City before my flight after I leave Kyoto. If not Im going to London next week and can try then.

Mesage is though dont just use the in-ear phones on those short flights (although they are more compact and nicer for that). Use them with the QC2s on longer flights as well.