Which headphone adapter do you use for your MacBook Air? I've seen several iPhone adapters out there, but I haven't come across any that specifically say for MBA. The headphones I use (V-Moda Vibe Duo and Bose QC2) are built for iPhone, but still don't fit past that stupid lip on the headphone door. Any help on adapters (or headphones you use) that fit the MacBook Air would be appreciated! Thanks!