My concerns would be A) the battery life, they won't make it the length of some domestic US flights and B) considering how expensive they are and their battery length limiting them to being workout headphones and not daily headphones are they really water resistant? Every single water resistant headphone I've had doesn't last long once I start sweating at the gym but none have been this expensive.

Honestly what I really want is a iPod nano (small square with screen) form factor device with a crippled GSM service (like the older Kindles) that lets me use music streaming services like Pandora and also local MP3s. The headphones are secondary.